The Earth's Moon: In Depth

How does the moon compare in size to Earth? (Hint: paragraph 3/4)

• The moon is smaller than Earth.

• The moon is about the same size as Earth.

• The moon is larger than Earth.

• The moon is about one-third the width of Earth.

How long does it take for the moon to complete an orbit around Earth? (Hint: paragraph 6)

• 27 Earth days

• 30 Earth days

• 29 Earth days

• 31 Earth days

According to the leading theory, how was the moon formed? (Hint: paragraph 7)

• A Mars-sized body collided with Earth.

• It was formed 4.5 billion years ago.

• It was formed from debris from Earth and the impactor.

• It was formed 239,000 miles away from Earth.

What are the main components of the moon's structure? (Hint: paragraph 8)

• Core, mantle, and crust

• Core, mantle, and regolith

• Core, mantle, and atmosphere

• Core, crust, and regolith

What are the dark areas on the moon's surface called? (Hint: paragraph 14)

• Maria

• Impact basins

• Highlands

• Craters