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Rocks in space that enter Earth's atmosphere are called meteoroids. Meteoroids heat up, and glow as they fall through Earth's atmosphere. Most meteoroids burn up before they hit Earth's surface. When a meteoroid hits Earth it can make a hole called a crater.
Question 1
As a meteoroid approaches Earth and its atmosphere, it speeds up. Why does this happen?
A. The meteoroid is pulled in by the rotation of Earth.
B. The meteoroid is pushed by the light of the Sun.
C. The meteoroid is attracted to the mass of Earth.
D. The meteoroid is repelled by the vacuum of space.
Refer to "Meteoroids and Craters" above. Complete the sentence by filling in the blanks. Choose from the words in the parenthesis.
Question 2
What is the effect of a planet's atmosphere on the number of craters on a planet's surface?
The thicker a planet's atmosphere is, the (more, fewer) ___________ craters its surface will have because (more, fewer) ______________ meteoroids will burn up in the atmosphere.
Consider the following three craters.
Question 3
Put the craters in order by the size of the meteoroids that caused them, from largest to smallest.
Question 4
Put the craters in order by when they were formed, from oldest to newest.
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