Across
- 3. what is in mars's soil that makes it a reddish color
- 4. the average distance from Earth to the sun
- 5. planets planets made of rock and metal with a solid outer layer
- 7. What is the the time it takes an object to make a complete rotation called?
- 9. What is made of gas, dust and ice and moves around the sun in oval orbit?
Down
- 1. What occurs when a planet's atmosphere traps the suns heat and causes the planet to heat up?
- 2. The time it takes an object to travel around the sun once
- 6. what is the closest planet to the sun?
- 8. What are small rocky objects that orbit the sun between Mars and Jupiter?
- 10. planet that is half the size of Earth