Across
- 2. This planet and Mercury do not have moons
- 4. Downward force of gravity on an object
- 6. When enters the Earth's atmosphere it burns up
- 7. True or False: All planets have an atmosphere
- 9. Something that causes a change in motion
- 10. Metallic, rocky objects that move independently around the sun
- 12. Earth has this many layers
- 13. These planets are larger in size
- 14. Resembles a small planet but can not be considered one
- 18. Average weather conditions over a long period of time
Down
- 1. Rocky metallic object that lands on Earth's surface
- 3. Metric unit of force and weight
- 5. Force of attraction based on object's mass
- 6. Rocky metallic object floating around in space
- 8. day to day conditions of Earth's atmosphere
- 11. Amount of matter in an object
- 15. These planets are more dense and are close together
- 16. Mass of frozen gas, dust and ice crystals
- 17. All planets must orbit this