Scientists who have recently 1 dinosaur skeletons could not come up with a 2 explanation for the sudden change in climate which caused their 3 . Astronomers, however, have proposed the following explanation: a meteor strike. The theory is quite 4 . A meteor, approximately 1km in 5 struck the earth and caused a massive dust cloud. The rising dust then created a “blanket” in the atmosphere which 6 approaching solar rays from heating the earth.

This “Dust Cloud Theory” was not 7 by reviewing scientists when it was first proposed. Many climatologists believed that some other, perhaps magnetic, cause 8 the sudden change. These scientists were usually supported by geologists.

However, newly-discovered geological 9 supports the “Meteor Theory”. Pictures from space of Hudson Bay have 10 the location of a possible impact. A crater appears near the southeastern tip of the bay, and a meteorite large enough to make such a crater would indeed be large enough to create a dust cloud 11 of causing the speculated climated change.

Because of this new 12 , many astronomers are working on new methods of preventing this from happening again. All 13 meteors are labeled and monitored by special monitoring stations. 14 , observing astronomers predict that no approaching meteor or comet is going to pass near enough to us to be of any worry.

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2 suitable fit correct truthful
3 destruction loss death extinction
4 sensitive logical likely sane
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7 denied accepted understood regretted
8 activated triggered halted generated
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10 revealed uncovered brought advised
11 competent talented capable proficient
12 view method vision sight
13 imminent looming forthcoming approaching
14 Happily Luckily Accidentally Intentionally