Multiple Choice
Identify the choice that best completes the statement or
answers the question.
|
|
|
1.
|
When did the solar system form?
a. | 500 billion years ago | b. | 50 billion years ago | c. | 5 billion years
ago | d. | 500 million years ago |
|
|
|
2.
|
What two gasses form most of the material in our sun?
a. | oxygen and carbon dioxide | b. | hydrogen and helium | c. | argon and
krypton | d. | neon and water vapor |
|
|
|
3.
|
The features of the surface of the moon were formed mainly by
a. | volcanoes | b. | wind | c. | erosion | d. | meteors |
|
|
|
4.
|
What melted metal forms most of the core of the earth?
a. | aluminum | b. | iron | c. | cobalt | d. | nickle |
|
|
|
5.
|
Our sun is known as a
a. | white dwarf | b. | red dwarf | c. | quasar | d. | yellow dwarf |
|