Questões de Inglês - AFA 2021 | Gabarito e resoluções

(AFA - 2021) The End of life on Earth It weighted about 10,000 tons, entered the atmosphere at a speed of 64,000 km/h and exploded over a city with a blast of 500 kilotons. But on 15 February 2013, we were lucky. The meteorite that 5showered pieces of rock over Chelyabinsk, Russia, was relatively small, at only about 17 metres wide. Although many people were injured by falling glass, the damage was nothing compared to what had happened in Siberia neraly one hundred years ago, when a relatively small 10 object (approximately 50 metres in diameter) exploded in mid-air over a forest region, flattening about 80 million trees. If it had exploded over a city such as Moscow or London, millions of people would have been killed. By a strange coincidence, the same day that the 15 meteorite terrified the people of Chelyabinsk, another 50m-wide asteroid passed relatively close to Earth. Scientists were expecting that visit and know that the asteroid will return to fly close by us in 2046, but the Russian meteorite earlier in the day had been too small 20 for anyone to spot. Most scientists agree that comets and asteroids pose the biggest natural threat to human existence. It was probably a large asteroid or comet collinding with Earth which wiped out the dinosaurs about 65 million 25years ago. An enormous object, 10 to 16 km in diameter, struck the Yucatan region in Mexico with the force of 100 megatons. That is the equivalent of one Hiroshima bomb for every peerson alive on Earth today. Many scientists, including the late Stephen 30Hawking, say that any comet or asteroid greater than 20km in diameter that hits Earth will result in the complete destruction of complex life, including all animals and most plants. As we have seen even a much smaller asteroid can cause great damage. 35The Earth has been kept fairly safe for the last 65 million years by good fortune and the massive gravitational field of the planet Jupiter. Our cosmic guardian, with its stable circular orbit far from the sun, sweeps up and scatters away most of the dangerous 40comets and asteroids which might cross Earths orbit. After the Chelyabinsk meteorite, scientists are now monitoring potential hazards even more carefully but, as far as they know, there is no danger in the foreseeable future. 45Types of space rocks Comet - a ball of rock and ice that sends out a tail of gas and dust behind it. Bright comets only appear in our visible night sky about once every ten years. Asteroid - a rock a few feet to several kms in 50diameter. Unlike comets, asteroids have no tail. Most are to small to cause any damage and burn up in the atmosphere. Meteoroid - part of an asteroid or comet. Meteorite - what a meteoroid is called when it 55hits Earth. Taken from: http://learningenglishteens.britishcouncil.org - Access on 29/06/2020 The damage caused by the Russian meteorite

QUESTO ANULADA!! Selecione a alternativa C e v para a prxima. (AFA - 2021 - Modelo C - Questo 34) The End of life on Earth It weighted about 10,000 tons, entered the atmosphere at a speed of 64,000 km/h and exploded over a city with a blast of 500 kilotons. But on 15 February 2013, we were lucky. The meteorite that 5showered pieces of rock over Chelyabinsk, Russia, was relatively small, at only about 17 metres wide. Although many people were injured by falling glass, the damage was nothing compared to what had happened in Siberia neraly one hundred years ago, when a relatively small 10object (approximately 50 metres in diameter) exploded in mid-air over a forest region, flattening about 80 million trees. If it had exploded over a city such as Moscow or London, millions of people would have been killed. By a strange coincidence, the same day that the 15meteorite terrified the people of Chelyabinsk, another 50m-wide asteroid passed relatively close to Earth. Scientists were expecting that visit and know that the asteroid will return to fly close by us in 2046, but the Russian meteorite earlier in the day had been too small 20for anyone to spot. Most scientists agree that comets and asteroids pose the biggest natural threat to human existence. It was probably a large asteroid or comet collinding with Earth which wiped out the dinosaurs about 65 million 25years ago. An enormous object, 10 to 16 km in diameter, struck the Yucatan region in Mexico with the force of 100 megatons. That is the equivalent of one Hiroshima bomb for every peerson alive on Earth today. Many scientists, including the late Stephen 30Hawking, say that any comet or asteroid greater than 20km in diameter that hits Earth will result in the complete destruction of complex life, including all animals and most plants. As we have seen even a much smaller asteroid can cause great damage. 35The Earth has been kept fairly safe for the last 65 million years by good fortune and the massive gravitational field of the planet Jupiter. Our cosmic guardian, with its stable circular orbit far from the sun, sweeps up and scatters away most of the dangerous 40comets and asteroids which might cross Earths orbit. After the Chelyabinsk meteorite, scientists are now monitoring potential hazards even more carefully but, as far as they know, there is no danger in the foreseeable future. 45Types of space rocks Comet - a ball of rock and ice that sends out a tail of gas and dust behind it. Bright comets only appear in our visible night sky about once every ten years. Asteroid - a rock a few feet to several kms in 50diameter. Unlike comets, asteroids have no tail. Most are to small to cause any damage and burn up in the atmosphere. Meteoroid - part of an asteroid or comet. Meteorite - what a meteoroid is called when it 55hits Earth. Taken from: http://learningenglishteens.britishcouncil.org - Access on 29/06/2020 Without changing the meaning, the word although (line 6) could be substituted for:

(AFA - 2021) The End of life on Earth It weighted about 10,000 tons, entered the atmosphere at a speed of 64,000 km/h and exploded over a city with a blast of 500 kilotons. But on 15 February 2013, we were lucky. The meteorite that 5showered pieces of rock over Chelyabinsk, Russia, was relatively small, at only about 17 metres wide. Although many people were injured by falling glass, the damage was nothing compared to what had happened in Siberia neraly one hundred years ago, when a relatively small 10object (approximately 50 metres in diameter) exploded in mid-air over a forest region, flattening about 80 million trees. If it had exploded over a city such as Moscow or London, millions of people would have been killed. By a strange coincidence, the same day that the 15meteorite terrified the people of Chelyabinsk, another 50m-wide asteroid passed relatively close to Earth. Scientists were expecting that visit and know that the asteroid will return to fly close by us in 2046, but the Russian meteorite earlier in the day had been too small 20for anyone to spot. Most scientists agree that comets and asteroids pose the biggest natural threat to human existence. It was probably a large asteroid or comet collinding with Earth which wiped out the dinosaurs about 65 million 25years ago. An enormous object, 10 to 16 km in diameter, struck the Yucatan region in Mexico with the force of 100 megatons. That is the equivalent of one Hiroshima bomb for every peerson alive on Earth today. Many scientists, including the late Stephen 30Hawking, say that any comet or asteroid greater than 20km in diameter that hits Earth will result in the complete destruction of complex life, including all animals and most plants. As we have seen even a much smaller asteroid can cause great damage. 35The Earth has been kept fairly safe for the last 65 million years by good fortune and the massive gravitational field of the planet Jupiter. Our cosmic guardian, with its stable circular orbit far from the sun, sweeps up and scatters away most of the dangerous 40comets and asteroids which might cross Earths orbit. After the Chelyabinsk meteorite, scientists are now monitoring potential hazards even more carefully but, as far as they know, there is no danger in the foreseeable future. 45Types of space rocks Comet - a ball of rock and ice that sends out a tail of gas and dust behind it. Bright comets only appear in our visible night sky about once every ten years. Asteroid - a rock a few feet to several kms in 50diameter. Unlike comets, asteroids have no tail. Most are to small to cause any damage and burn up in the atmosphere. Meteoroid - part of an asteroid or comet. Meteorite - what a meteoroid is called when it 55hits Earth. Taken from: http://learningenglishteens.britishcouncil.org - Access on 29/06/2020 The statement many people were injured by falling glass (line 7) stands for Falling glass _____________ many people.

(AFA - 2021) The End of life on Earth It weighted about 10,000 tons, entered the atmosphere at a speed of 64,000 km/h and exploded over a city with a blast of 500 kilotons. But on 15 February 2013, we were lucky. The meteorite that 5showered pieces of rock over Chelyabinsk, Russia, was relatively small, at only about 17 metres wide. Although many people were injured by falling glass, the damage was nothing compared to what had happened in Siberia neraly one hundred years ago, when a relatively small 10object (approximately 50 metres in diameter) exploded in mid-air over a forest region, flattening about 80 million trees. If it had exploded over a city such as Moscow or London, millions of people would have been killed. By a strange coincidence, the same day that the 15meteorite terrified the people of Chelyabinsk, another 50m-wide asteroid passed relatively close to Earth. Scientists were expecting that visit and know that the asteroid will return to fly close by us in 2046, but the Russian meteorite earlier in the day had been too small 20for anyone to spot. Most scientists agree that comets and asteroids pose the biggest natural threat to human existence. It was probably a large asteroid or comet collinding with Earth which wiped out the dinosaurs about 65 million 25years ago. An enormous object, 10 to 16 km in diameter, struck the Yucatan region in Mexico with the force of 100 megatons. That is the equivalent of one Hiroshima bomb for every peerson alive on Earth today. Many scientists, including the late Stephen 30Hawking, say that any comet or asteroid greater than 20km in diameter that hits Earth will result in the complete destruction of complex life, including all animals and most plants. As we have seen even a much smaller asteroid can cause great damage. 35The Earth has been kept fairly safe for the last 65 million years by good fortune and the massive gravitational field of the planet Jupiter. Our cosmic guardian, with its stable circular orbit far from the sun, sweeps up and scatters away most of the dangerous 40comets and asteroids which might cross Earths orbit. After the Chelyabinsk meteorite, scientists are now monitoring potential hazards even more carefully but, as far as they know, there is no danger in the foreseeable future. 45Types of space rocks Comet - a ball of rock and ice that sends out a tail of gas and dust behind it. Bright comets only appear in our visible night sky about once every ten years. Asteroid - a rock a few feet to several kms in 50diameter. Unlike comets, asteroids have no tail. Most are to small to cause any damage and burn up in the atmosphere. Meteoroid - part of an asteroid or comet. Meteorite - what a meteoroid is called when it 55hits Earth. Taken from: http://learningenglishteens.britishcouncil.org - Access on 29/06/2020 The passage the damage was nothing compared to what had happened in Siberia nearly one hundred years ago(lines 7 to 9) states that the incident occured __________ a century ago.

(AFA - 2021) The End of life on Earth It weighted about 10,000 tons, entered the atmosphere at a speed of 64,000 km/h and exploded over a city with a blast of 500 kilotons. But on 15 February 2013, we were lucky. The meteorite that 5showered pieces of rock over Chelyabinsk, Russia, was relatively small, at only about 17 metres wide. Although many people were injured by falling glass, the damage was nothing compared to what had happened in Siberia neraly one hundred years ago, when a relatively small 10object (approximately 50 metres in diameter) exploded in mid-air over a forest region, flattening about 80 million trees. If it had exploded over a city such as Moscow or London, millions of people would have been killed. By a strange coincidence, the same day that the 15meteorite terrified the people of Chelyabinsk, another 50m-wide asteroid passed relatively close to Earth. Scientists were expecting that visit and know that the asteroid will return to fly close by us in 2046, but the Russian meteorite earlier in the day had been too small 20for anyone to spot. Most scientists agree that comets and asteroids pose the biggest natural threat to human existence. It was probably a large asteroid or comet collinding with Earth which wiped out the dinosaurs about 65 million 25years ago. An enormous object, 10 to 16 km in diameter, struck the Yucatan region in Mexico with the force of 100 megatons. That is the equivalent of one Hiroshima bomb for every peerson alive on Earth today. Many scientists, including the late Stephen 30Hawking, say that any comet or asteroid greater than 20km in diameter that hits Earth will result in the complete destruction of complex life, including all animals and most plants. As we have seen even a much smaller asteroid can cause great damage. 35The Earth has been kept fairly safe for the last 65 million years by good fortune and the massive gravitational field of the planet Jupiter. Our cosmic guardian, with its stable circular orbit far from the sun, sweeps up and scatters away most of the dangerous 40comets and asteroids which might cross Earths orbit. After the Chelyabinsk meteorite, scientists are now monitoring potential hazards even more carefully but, as far as they know, there is no danger in the foreseeable future. 45Types of space rocks Comet - a ball of rock and ice that sends out a tail of gas and dust behind it. Bright comets only appear in our visible night sky about once every ten years. Asteroid - a rock a few feet to several kms in 50diameter. Unlike comets, asteroids have no tail. Most are to small to cause any damage and burn up in the atmosphere. Meteoroid - part of an asteroid or comet. Meteorite - what a meteoroid is called when it 55hits Earth. Taken from: http://learningenglishteens.britishcouncil.org - Access on 29/06/2020 The Siberian meteorite

(AFA - 2021) The End of life on Earth It weighted about 10,000 tons, entered the atmosphere at a speed of 64,000 km/h and exploded over a city with a blast of 500 kilotons. But on 15 February 2013, we were lucky. The meteorite that 5showered pieces of rock over Chelyabinsk, Russia, was relatively small, at only about 17 metres wide. Although many people were injured by falling glass, the damage was nothing compared to what had happened in Siberia neraly one hundred years ago, when a relatively small 10object (approximately 50 metres in diameter) exploded in mid-air over a forest region, flattening about 80 million trees. If it had exploded over a city such as Moscow or London, millions of people would have been killed. By a strange coincidence, the same day that the 15meteorite terrified the people of Chelyabinsk, another 50m-wide asteroid passed relatively close to Earth. Scientists were expecting that visit and know that the asteroid will return to fly close by us in 2046, but the Russian meteorite earlier in the day had been too small 20for anyone to spot. Most scientists agree that comets and asteroids pose the biggest natural threat to human existence. It was probably a large asteroid or comet collinding with Earth which wiped out the dinosaurs about 65 million 25years ago. An enormous object, 10 to 16 km in diameter, struck the Yucatan region in Mexico with the force of 100 megatons. That is the equivalent of one Hiroshima bomb for every peerson alive on Earth today. Many scientists, including the late Stephen 30Hawking, say that any comet or asteroid greater than 20km in diameter that hits Earth will result in the complete destruction of complex life, including all animals and most plants. As we have seen even a much smaller asteroid can cause great damage. 35The Earth has been kept fairly safe for the last 65 million years by good fortune and the massive gravitational field of the planet Jupiter. Our cosmic guardian, with its stable circular orbit far from the sun, sweeps up and scatters away most of the dangerous 40comets and asteroids which might cross Earths orbit. After the Chelyabinsk meteorite, scientists are now monitoring potential hazards even more carefully but, as far as they know, there is no danger in the foreseeable future. 45Types of space rocks Comet - a ball of rock and ice that sends out a tail of gas and dust behind it. Bright comets only appear in our visible night sky about once every ten years. Asteroid - a rock a few feet to several kms in 50diameter. Unlike comets, asteroids have no tail. Most are to small to cause any damage and burn up in the atmosphere. Meteoroid - part of an asteroid or comet. Meteorite - what a meteoroid is called when it 55hits Earth. Taken from: http://learningenglishteens.britishcouncil.org - Access on 29/06/2020 If it had exploded over a city such as Moscow or London, millions of people would have been killed(lines 12 and 13). We can conclude from the information in this passage that

(AFA - 2021) The End of life on Earth It weighted about 10,000 tons, entered the atmosphere at a speed of 64,000 km/h and exploded over a city with a blast of 500 kilotons. But on 15 February 2013, we were lucky. The meteorite that 5showered pieces of rock over Chelyabinsk, Russia, was relatively small, at only about 17 metres wide. Although many people were injured by falling glass, the damage was nothing compared to what had happened in Siberia neraly one hundred years ago, when a relatively small 10object (approximately 50 metres in diameter) exploded in mid-air over a forest region, flattening about 80 million trees. If it had exploded over a city such as Moscow or London, millions of people would have been killed. By a strange coincidence, the same day that the 15meteorite terrified the people of Chelyabinsk, another 50m-wide asteroid passed relatively close to Earth. Scientists were expecting that visit and know that the asteroid will return to fly close by us in 2046, but the Russian meteorite earlier in the day had been too small 20for anyone to spot. Most scientists agree that comets and asteroids pose the biggest natural threat to human existence. It was probably a large asteroid or comet collinding with Earth which wiped out the dinosaurs about 65 million 25years ago. An enormous object, 10 to 16 km in diameter, struck the Yucatan region in Mexico with the force of 100 megatons. That is the equivalent of one Hiroshima bomb for every peerson alive on Earth today. Many scientists, including the late Stephen 30Hawking, say that any comet or asteroid greater than 20km in diameter that hits Earth will result in the complete destruction of complex life, including all animals and most plants. As we have seen even a much smaller asteroid can cause great damage. 35The Earth has been kept fairly safe for the last 65 million years by good fortune and the massive gravitational field of the planet Jupiter. Our cosmic guardian, with its stable circular orbit far from the sun, sweeps up and scatters away most of the dangerous 40comets and asteroids which might cross Earths orbit. After the Chelyabinsk meteorite, scientists are now monitoring potential hazards even more carefully but, as far as they know, there is no danger in the foreseeable future. 45Types of space rocks Comet - a ball of rock and ice that sends out a tail of gas and dust behind it. Bright comets only appear in our visible night sky about once every ten years. Asteroid - a rock a few feet to several kms in 50diameter. Unlike comets, asteroids have no tail. Most are to small to cause any damage and burn up in the atmosphere. Meteoroid - part of an asteroid or comet. Meteorite - what a meteoroid is called when it 55hits Earth. Taken from: http://learningenglishteens.britishcouncil.org - Access on 29/06/2020 On the same day as the meteorite exploded over Chelyabinsk,

(AFA - 2021) The End of life on Earth It weighted about 10,000 tons, entered the atmosphere at a speed of 64,000 km/h and exploded over a city with a blast of 500 kilotons. But on 15 February 2013, we were lucky. The meteorite that 5showered pieces of rock over Chelyabinsk, Russia, was relatively small, at only about 17 metres wide. Although many people were injured by falling glass, the damage was nothing compared to what had happened in Siberia neraly one hundred years ago, when a relatively small 10object (approximately 50 metres in diameter) exploded in mid-air over a forest region, flattening about 80 million trees. If it had exploded over a city such as Moscow or London, millions of people would have been killed. By a strange coincidence, the same day that the 15meteorite terrified the people of Chelyabinsk, another 50m-wide asteroid passed relatively close to Earth. Scientists were expecting that visit and know that the asteroid will return to fly close by us in 2046, but the Russian meteorite earlier in the day had been too small 20for anyone to spot. Most scientists agree that comets and asteroids pose the biggest natural threat to human existence. It was probably a large asteroid or comet collinding with Earth which wiped out the dinosaurs about 65 million 25years ago. An enormous object, 10 to 16 km in diameter, struck the Yucatan region in Mexico with the force of 100 megatons. That is the equivalent of one Hiroshima bomb for every peerson alive on Earth today. Many scientists, including the late Stephen 30Hawking, say that any comet or asteroid greater than 20km in diameter that hits Earth will result in the complete destruction of complex life, including all animals and most plants. As we have seen even a much smaller asteroid can cause great damage. 35The Earth has been kept fairly safe for the last 65 million years by good fortune and the massive gravitational field of the planet Jupiter. Our cosmic guardian, with its stable circular orbit far from the sun, sweeps up and scatters away most of the dangerous 40comets and asteroids which might cross Earths orbit. After the Chelyabinsk meteorite, scientists are now monitoring potential hazards even more carefully but, as far as they know, there is no danger in the foreseeable future. 45Types of space rocks Comet - a ball of rock and ice that sends out a tail of gas and dust behind it. Bright comets only appear in our visible night sky about once every ten years. Asteroid - a rock a few feet to several kms in 50diameter. Unlike comets, asteroids have no tail. Most are to small to cause any damage and burn up in the atmosphere. Meteoroid - part of an asteroid or comet. Meteorite - what a meteoroid is called when it 55hits Earth. Taken from: http://learningenglishteens.britishcouncil.org - Access on 29/06/2020 In scientists were expectingthatvisit(line 17), the underlined word has the same use as in

(AFA - 2021) The End of life on Earth It weighted about 10,000 tons, entered the atmosphere at a speed of 64,000 km/h and exploded over a city with a blast of 500 kilotons. But on 15 February 2013, we were lucky. The meteorite that 5showered pieces of rock over Chelyabinsk, Russia, was relatively small, at only about 17 metres wide. Although many people were injured by falling glass, the damage was nothing compared to what had happened in Siberia neraly one hundred years ago, when a relatively small 10object (approximately 50 metres in diameter) exploded in mid-air over a forest region, flattening about 80 million trees. If it had exploded over a city such as Moscow or London, millions of people would have been killed. By a strange coincidence, the same day that the 15meteorite terrified the people of Chelyabinsk, another 50m-wide asteroid passed relatively close to Earth. Scientists were expecting that visit and know that the asteroid will return to fly close by us in 2046, but the Russian meteorite earlier in the day had been too small 20for anyone to spot. Most scientists agree that comets and asteroids pose the biggest natural threat to human existence. It was probably a large asteroid or comet collinding with Earth which wiped out the dinosaurs about 65 million 25years ago. An enormous object, 10 to 16 km in diameter, struck the Yucatan region in Mexico with the force of 100 megatons. That is the equivalent of one Hiroshima bomb for every peerson alive on Earth today. Many scientists, including the late Stephen 30Hawking, say that any comet or asteroid greater than 20km in diameter that hits Earth will result in the complete destruction of complex life, including all animals and most plants. As we have seen even a much smaller asteroid can cause great damage. 35The Earth has been kept fairly safe for the last 65 million years by good fortune and the massive gravitational field of the planet Jupiter. Our cosmic guardian, with its stable circular orbit far from the sun, sweeps up and scatters away most of the dangerous 40comets and asteroids which might cross Earths orbit. After the Chelyabinsk meteorite, scientists are now monitoring potential hazards even more carefully but, as far as they know, there is no danger in the foreseeable future. 45Types of space rocks Comet - a ball of rock and ice that sends out a tail of gas and dust behind it. Bright comets only appear in our visible night sky about once every ten years. Asteroid - a rock a few feet to several kms in 50diameter. Unlike comets, asteroids have no tail. Most are to small to cause any damage and burn up in the atmosphere. Meteoroid - part of an asteroid or comet. Meteorite - what a meteoroid is called when it 55hits Earth. Taken from: http://learningenglishteens.britishcouncil.org - Access on 29/06/2020 The Russian meteorite

(AFA - 2021) The End of life on Earth It weighted about 10,000 tons, entered the atmosphere at a speed of 64,000 km/h and exploded over a city with a blast of 500 kilotons. But on 15 February 2013, we were lucky. The meteorite that 5showered pieces of rock over Chelyabinsk, Russia, was relatively small, at only about 17 metres wide. Although many people were injured by falling glass, the damage was nothing compared to what had happened in Siberia neraly one hundred years ago, when a relatively small 10object (approximately 50 metres in diameter) exploded in mid-air over a forest region, flattening about 80 million trees. If it had exploded over a city such as Moscow or London, millions of people would have been killed. By a strange coincidence, the same day that the 15meteorite terrified the people of Chelyabinsk, another 50m-wide asteroid passed relatively close to Earth. Scientists were expecting that visit and know that the asteroid will return to fly close by us in 2046, but the Russian meteorite earlier in the day had been too small 20for anyone to spot. Most scientists agree that comets and asteroids pose the biggest natural threat to human existence. It was probably a large asteroid or comet collinding with Earth which wiped out the dinosaurs about 65 million 25years ago. An enormous object, 10 to 16 km in diameter, struck the Yucatan region in Mexico with the force of 100 megatons. That is the equivalent of one Hiroshima bomb for every peerson alive on Earth today. Many scientists, including the late Stephen 30Hawking, say that any comet or asteroid greater than 20km in diameter that hits Earth will result in the complete destruction of complex life, including all animals and most plants. As we have seen even a much smaller asteroid can cause great damage. 35The Earth has been kept fairly safe for the last 65 million years by good fortune and the massive gravitational field of the planet Jupiter. Our cosmic guardian, with its stable circular orbit far from the sun, sweeps up and scatters away most of the dangerous 40comets and asteroids which might cross Earths orbit. After the Chelyabinsk meteorite, scientists are now monitoring potential hazards even more carefully but, as far as they know, there is no danger in the foreseeable future. 45Types of space rocks Comet - a ball of rock and ice that sends out a tail of gas and dust behind it. Bright comets only appear in our visible night sky about once every ten years. Asteroid - a rock a few feet to several kms in 50diameter. Unlike comets, asteroids have no tail. Most are to small to cause any damage and burn up in the atmosphere. Meteoroid - part of an asteroid or comet. Meteorite - what a meteoroid is called when it 55hits Earth. Taken from: http://learningenglishteens.britishcouncil.org - Access on 29/06/2020 Experts maintain that comets and asteroids could

(AFA - 2021) The End of life on Earth It weighted about 10,000 tons, entered the atmosphere at a speed of 64,000 km/h and exploded over a city with a blast of 500 kilotons. But on 15 February 2013, we were lucky. The meteorite that 5showered pieces of rock over Chelyabinsk, Russia, was relatively small, at only about 17 metres wide. Although many people were injured by falling glass, the damage was nothing compared to what had happened in Siberia neraly one hundred years ago, when a relatively small 10object (approximately 50 metres in diameter) exploded in mid-air over a forest region, flattening about 80 million trees. If it had exploded over a city such as Moscow or London, millions of people would have been killed. By a strange coincidence, the same day that the 15meteorite terrified the people of Chelyabinsk, another 50m-wide asteroid passed relatively close to Earth. Scientists were expecting that visit and know that the asteroid will return to fly close by us in 2046, but the Russian meteorite earlier in the day had been too small 20for anyone to spot. Most scientists agree that comets and asteroids pose the biggest natural threat to human existence. It was probably a large asteroid or comet collinding with Earth which wiped out the dinosaurs about 65 million 25years ago. An enormous object, 10 to 16 km in diameter, struck the Yucatan region in Mexico with the force of 100 megatons. That is the equivalent of one Hiroshima bomb for every peerson alive on Earth today. Many scientists, including the late Stephen 30Hawking, say that any comet or asteroid greater than 20km in diameter that hits Earth will result in the complete destruction of complex life, including all animals and most plants. As we have seen even a much smaller asteroid can cause great damage. 35The Earth has been kept fairly safe for the last 65 million years by good fortune and the massive gravitational field of the planet Jupiter. Our cosmic guardian, with its stable circular orbit far from the sun, sweeps up and scatters away most of the dangerous 40comets and asteroids which might cross Earths orbit. After the Chelyabinsk meteorite, scientists are now monitoring potential hazards even more carefully but, as far as they know, there is no danger in the foreseeable future. 45Types of space rocks Comet - a ball of rock and ice that sends out a tail of gas and dust behind it. Bright comets only appear in our visible night sky about once every ten years. Asteroid - a rock a few feet to several kms in 50diameter. Unlike comets, asteroids have no tail. Most are to small to cause any damage and burn up in the atmosphere. Meteoroid - part of an asteroid or comet. Meteorite - what a meteoroid is called when it 55hits Earth. Taken from: http://learningenglishteens.britishcouncil.org - Access on 29/06/2020 A relatively small asteroid

(AFA - 2021) The End of life on Earth It weighted about 10,000 tons, entered the atmosphere at a speed of 64,000 km/h and exploded over a city with a blast of 500 kilotons. But on 15 February 2013, we were lucky. The meteorite that 5showered pieces of rock over Chelyabinsk, Russia, was relatively small, at only about 17 metres wide. Although many people were injured by falling glass, the damage was nothing compared to what had happened in Siberia neraly one hundred years ago, when a relatively small 10object (approximately 50 metres in diameter) exploded in mid-air over a forest region, flattening about 80 million trees. If it had exploded over a city such as Moscow or London, millions of people would have been killed. By a strange coincidence, the same day that the 15meteorite terrified the people of Chelyabinsk, another 50m-wide asteroid passed relatively close to Earth. Scientists were expecting that visit and know that the asteroid will return to fly close by us in 2046, but the Russian meteorite earlier in the day had been too small 20for anyone to spot. Most scientists agree that comets and asteroids pose the biggest natural threat to human existence. It was probably a large asteroid or comet collinding with Earth which wiped out the dinosaurs about 65 million 25years ago. An enormous object, 10 to 16 km in diameter, struck the Yucatan region in Mexico with the force of 100 megatons. That is the equivalent of one Hiroshima bomb for every peerson alive on Earth today. Many scientists, including the late Stephen 30Hawking, say that any comet or asteroid greater than 20km in diameter that hits Earth will result in the complete destruction of complex life, including all animals and most plants. As we have seen even a much smaller asteroid can cause great damage. 35The Earth has been kept fairly safe for the last 65 million years by good fortune and the massive gravitational field of the planet Jupiter. Our cosmic guardian, with its stable circular orbit far from the sun, sweeps up and scatters away most of the dangerous 40comets and asteroids which might cross Earths orbit. After the Chelyabinsk meteorite, scientists are now monitoring potential hazards even more carefully but, as far as they know, there is no danger in the foreseeable future. 45Types of space rocks Comet - a ball of rock and ice that sends out a tail of gas and dust behind it. Bright comets only appear in our visible night sky about once every ten years. Asteroid - a rock a few feet to several kms in 50diameter. Unlike comets, asteroids have no tail. Most are to small to cause any damage and burn up in the atmosphere. Meteoroid - part of an asteroid or comet. Meteorite - what a meteoroid is called when it 55hits Earth. Taken from: http://learningenglishteens.britishcouncil.org - Access on 29/06/2020 Earth has been relatively save thanks to

(AFA - 2021) The End of life on Earth It weighted about 10,000 tons, entered the atmosphere at a speed of 64,000 km/h and exploded over a city with a blast of 500 kilotons. But on 15 February 2013, we were lucky. The meteorite that 5showered pieces of rock over Chelyabinsk, Russia, was relatively small, at only about 17 metres wide. Although many people were injured by falling glass, the damage was nothing compared to what had happened in Siberia neraly one hundred years ago, when a relatively small 10object (approximately 50 metres in diameter) exploded in mid-air over a forest region, flattening about 80 million trees. If it had exploded over a city such as Moscow or London, millions of people would have been killed. By a strange coincidence, the same day that the 15meteorite terrified the people of Chelyabinsk, another 50m-wide asteroid passed relatively close to Earth. Scientists were expecting that visit and know that the asteroid will return to fly close by us in 2046, but the Russian meteorite earlier in the day had been too small 20for anyone to spot. Most scientists agree that comets and asteroids pose the biggest natural threat to human existence. It was probably a large asteroid or comet collinding with Earth which wiped out the dinosaurs about 65 million 25years ago. An enormous object, 10 to 16 km in diameter, struck the Yucatan region in Mexico with the force of 100 megatons. That is the equivalent of one Hiroshima bomb for every peerson alive on Earth today. Many scientists, including the late Stephen 30Hawking, say that any comet or asteroid greater than 20km in diameter that hits Earth will result in the complete destruction of complex life, including all animals and most plants. As we have seen even a much smaller asteroid can cause great damage. 35The Earth has been kept fairly safe for the last 65 million years by good fortune and the massive gravitational field of the planet Jupiter. Our cosmic guardian, with its stable circular orbit far from the sun, sweeps up and scatters away most of the dangerous 40comets and asteroids which might cross Earths orbit. After the Chelyabinsk meteorite, scientists are now monitoring potential hazards even more carefully but, as far as they know, there is no danger in the foreseeable future. 45Types of space rocks Comet - a ball of rock and ice that sends out a tail of gas and dust behind it. Bright comets only appear in our visible night sky about once every ten years. Asteroid - a rock a few feet to several kms in 50diameter. Unlike comets, asteroids have no tail. Most are to small to cause any damage and burn up in the atmosphere. Meteoroid - part of an asteroid or comet. Meteorite - what a meteoroid is called when it 55hits Earth. Taken from: http://learningenglishteens.britishcouncil.org - Access on 29/06/2020 Which (line 40) refers to

(AFA - 2021) The End of life on Earth It weighted about 10,000 tons, entered the atmosphere at a speed of 64,000 km/h and exploded over a city with a blast of 500 kilotons. But on 15 February 2013, we were lucky. The meteorite that 5showered pieces of rock over Chelyabinsk, Russia, was relatively small, at only about 17 metres wide. Although many people were injured by falling glass, the damage was nothing compared to what had happened in Siberia neraly one hundred years ago, when a relatively small 10object (approximately 50 metres in diameter) exploded in mid-air over a forest region, flattening about 80 million trees. If it had exploded over a city such as Moscow or London, millions of people would have been killed. By a strange coincidence, the same day that the 15meteorite terrified the people of Chelyabinsk, another 50m-wide asteroid passed relatively close to Earth. Scientists were expecting that visit and know that the asteroid will return to fly close by us in 2046, but the Russian meteorite earlier in the day had been too small 20for anyone to spot. Most scientists agree that comets and asteroids pose the biggest natural threat to human existence. It was probably a large asteroid or comet collinding with Earth which wiped out the dinosaurs about 65 million 25years ago. An enormous object, 10 to 16 km in diameter, struck the Yucatan region in Mexico with the force of 100 megatons. That is the equivalent of one Hiroshima bomb for every peerson alive on Earth today. Many scientists, including the late Stephen 30Hawking, say that any comet or asteroid greater than 20km in diameter that hits Earth will result in the complete destruction of complex life, including all animals and most plants. As we have seen even a much smaller asteroid can cause great damage. 35The Earth has been kept fairly safe for the last 65 million years by good fortune and the massive gravitational field of the planet Jupiter. Our cosmic guardian, with its stable circular orbit far from the sun, sweeps up and scatters away most of the dangerous 40comets and asteroids which might cross Earths orbit. After the Chelyabinsk meteorite, scientists are now monitoring potential hazards even more carefully but, as far as they know, there is no danger in the foreseeable future. 45Types of space rocks Comet - a ball of rock and ice that sends out a tail of gas and dust behind it. Bright comets only appear in our visible night sky about once every ten years. Asteroid - a rock a few feet to several kms in 50diameter. Unlike comets, asteroids have no tail. Most are to small to cause any damage and burn up in the atmosphere. Meteoroid - part of an asteroid or comet. Meteorite - what a meteoroid is called when it 55hits Earth. Taken from: http://learningenglishteens.britishcouncil.org - Access on 29/06/2020 In the sentence the dangerous comets and asteroids whichmightcross Earths orbit(lines 39 and 40), the underlined word is similar to

(AFA - 2021) The End of life on Earth It weighted about 10,000 tons, entered the atmosphere at a speed of 64,000 km/h and exploded over a city with a blast of 500 kilotons. But on 15 February 2013, we were lucky. The meteorite that 5showered pieces of rock over Chelyabinsk, Russia, was relatively small, at only about 17 metres wide. Although many people were injured by falling glass, the damage was nothing compared to what had happened in Siberia neraly one hundred years ago, when a relatively small 10object (approximately 50 metres in diameter) exploded in mid-air over a forest region, flattening about 80 million trees. If it had exploded over a city such as Moscow or London, millions of people would have been killed. By a strange coincidence, the same day that the 15meteorite terrified the people of Chelyabinsk, another 50m-wide asteroid passed relatively close to Earth. Scientists were expecting that visit and know that the asteroid will return to fly close by us in 2046, but the Russian meteorite earlier in the day had been too small 20for anyone to spot. Most scientists agree that comets and asteroids pose the biggest natural threat to human existence. It was probably a large asteroid or comet collinding with Earth which wiped out the dinosaurs about 65 million 25years ago. An enormous object, 10 to 16 km in diameter, struck the Yucatan region in Mexico with the force of 100 megatons. That is the equivalent of one Hiroshima bomb for every peerson alive on Earth today. Many scientists, including the late Stephen 30Hawking, say that any comet or asteroid greater than 20km in diameter that hits Earth will result in the complete destruction of complex life, including all animals and most plants. As we have seen even a much smaller asteroid can cause great damage. 35The Earth has been kept fairly safe for the last 65 million years by good fortune and the massive gravitational field of the planet Jupiter. Our cosmic guardian, with its stable circular orbit far from the sun, sweeps up and scatters away most of the dangerous 40comets and asteroids which might cross Earths orbit. After the Chelyabinsk meteorite, scientists are now monitoring potential hazards even more carefully but, as far as they know, there is no danger in the foreseeable future. 45Types of space rocks Comet - a ball of rock and ice that sends out a tail of gas and dust behind it. Bright comets only appear in our visible night sky about once every ten years. Asteroid - a rock a few feet to several kms in 50diameter. Unlike comets, asteroids have no tail. Most are to small to cause any damage and burn up in the atmosphere. Meteoroid - part of an asteroid or comet. Meteorite - what a meteoroid is called when it 55hits Earth. Taken from: http://learningenglishteens.britishcouncil.org - Access on 29/06/2020 Scientists support the idea that