Stars And Galaxies Worksheet Page 2

Name ________________________________

Date ____________________

Stars and Galaxies (continued)

7. The Milky Way contains about ________ stars.

a. 1 billion

b. 10 billion

c. 100 billion

8. A black hole is ________.

a. a massive star that used up its fuel and collapsed

b. a galaxy that got sucked into a nebula

c. a nebula that expanded and then collapsed

9. Scientists estimate that the Big Bang occurred ________.

a. 5 billion years ago

b. 15 billion years ago

c. 50 billion years ago

10. It takes light from the Sun ________ to reach Earth.

a. 90 seconds

b. 5 minutes

c. 8 1/2 minutes

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