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Review Checklist - Sample Questions

Comets

• What are comets?
• What are the main differences between comets and asteroids?
• How large are the largest comets?
• In what direction does the tail of a comet point?
• Why can a comet have two tails?
• Where do comets come from?
• Can a comet swing by our part of the Solar System more than once?
• How often does Halley's comet come close to the Earth? 
• What happens to comets over long periods of time?
• Where did all the water on the Earth's surface come from?

The Oort Cloud

• What is the Oort Cloud?
• How do comets from the Oort Cloud differ from the Kuiper Belt ones?
• How far out from the Sun does the Oort Cloud extend?
• How does the shape of the Oort Cloud differ from that of the Kuiper Belt?
• Which are the farthest confirmed objects in the solar system?