Task 2. Reading. Read the text and complete the task
In 2010, the planetary defence team at NASA had identified and logged 90 per cent of the asteroids near Earth measuring 1km wide. These ‘near-Earth objects’, or NEOs, are the size of mountains and include anything within 50 million kilometres of Earth’s orbit. With an estimated 50 left to log, NASA says none of the 887 it knows about are a significant danger to the planet.
Now NASA is working towards logging some of the smaller asteroids, those measuring 140 metres wide or more. Of the 25,000 estimated asteroids of this size, so far about 8,000 have been logged, leaving 17,000 unaccounted for. Considering that a 19-metre asteroid that exploded above the city of Chelyabinsk in Russia in 2013 injured 1,200 people, these middle-sized asteroids would be a serious danger if they enter Earth’s orbit.
Whether NASA can find the remaining middle-sized NEOs depends on getting the money to build NEOCam, a 0.5-metre space telescope which would use infrared light to locate asteroids. If it did get the money, it could probably achieve its goal in ten years. Once logged, the planetary defence team would still need to work out how to defend the planet against being hit by the truly worrying asteroids – the PHAs.
‘Potentially Hazardous Asteroids’ are rocks close enough to pass within 7.5 million kilometres of Earth’s orbit. NASA has created a map of 1,400 PHAs, none of which are expected to be a threat in the next one hundred years. With technology already available, NASA can track these objects and make predictions about possible impact, at which point two defence solutions could be launched.
The first is DART – the Double Asteroid Redirection Test. Plans are scheduled to test DART on the moon of an asteroid called Didymos. ‘Didymoon’ is 150 metres wide, orbiting its 800-metre mother, and hopefully the impact of DART will knock it out of its orbit enough for Earth-based telescopes to pick up.
A B C D E
……… Information about a plan that needs finance before it can happen
……… Information about asteroids that are the biggest danger to Earth
……… Information about the numbers of unidentified asteroids near Earth
……… Information about NASA’s most successful project to record asteroids near Earth
……… A solution planned for testing
1. The problem is too complex for you to deal with it alone.
2. He has a very good memory. He only needs to hear a word once, and he will remember it for the rest of his life.
3. He asked for books to be sent to him by mail.
4. They need to rest in order to be in good shape for competitions.
5. it's okay for You to say that I can do this job, but I'm not so sure.
6. The trip is too interesting to us to lose her.
7. They were waiting for their lunch to be served.
8. You don't need to work so hard and risk your health.
Объяснение:
1. I don’t eat many.. mangoes. 2. Не does not eat much... fish. 3. She ate so .much.. dessert that she is in bed today with a stomachache. 4. That man drank so much... wine, and he smoked so many cigarettes that he has a terrible headache today. 5. Маrу must not eat too .much.. food because she has a weight problem. 6. My mum says I eat too much... French fries and drink too much... beer She wants me to be healthy. 7. There is not too much.. space in my flat. 8. There are not many pictures in this room. 9. There are so many teachers at our school, but not... many of them are men. 10. Not.many... of these books are new. 11. Thanks awfully for the books you sent m yesterday. — Don’t mention it, it wasn’t .much.. bother. 12. Much... of her advice was not useful at all. 13. He has got so manypairs of socks. 14. Please, don’t put much... pepper on the meat. 15. There were too many plates on the table. 16. I never eat..much bread with soup. 17. Why did you eat so .much.. ice cream? 18. She wrote us not very many letters from the country. 19. Many of these student don’t like to look up words in the dictionary. 20. Do you drink much... coffee? — Yes, a lot. Do you watch TV much...? — No, not...much. 21. Not..many.. of the answers were correct. 22. How much... money did you spend last Friday 23. The students enjoyed the concert very much.