3.
The
end of life on Earth?
Part 1
提醒：於閱讀中您可以使用下表中的學習資源查詢您於閱讀中所想多了解的字彙或是您認為對閱讀該段落重要的單字。
It weighed
about 10,000 tons, entered the atmosphere at a speed of 64,000km/h and exploded
over a city with a blast of 500 kilotons. But on 15 February 2013, we were
lucky. The meteorite that showered 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 nearly one hundred years ago. Another relatively small 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 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
for anyone to spot.
看完第一部分後，覺得意猶未盡，我還想看更多！可以按頁面下方的下一頁箭頭進行閱讀。
學習資源：
|
No. |
Learning Resources |
Link |
|
1. |
||
|
2. |
||
|
3. |
||
|
4. |
||
|
5. |
