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Welcome to the Astro-Venture Geology Mission!
Before you begin this section, you should be able to answer the following:

1. Why is space radiation so dangerous?
--Choose one--
A. It causes cancer and mutations in living things.
B. It removes carbon dioxide from our atmosphere.
C. It slows down Earth's liquid outer core.

2. How is life on Earth protected from space radiation?
--Choose one--
A. Water vapor clouds in the atmosphere.
B. A thick atmosphere and a magnetic field.
C. Greenhouse gases, like carbon dioxide.

3. What would happen if the crust and mantle stopped moving?
--Choose one--
A. Volcanic activity would increase and Earth would become very hot.
B. Carbon dioxide would not be released into the atmosphere and Earth would become very cold.
C. Space radiation would bombard Earth's surface and harm life.

4. If the Earth's mantle motion increased, what would happen?
--Choose one--
A. Volcanic activity would increase causing ash to fill the air.
B. Carbon dioxide would not be released into the atmosphere.
C. Space radiation would bombard Earth's surface.

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