Across
- 2. third planet from Sun
- 3. the force that pulls 2 objects towards each other
- 4. the layer of gases that surround the Earth
- 7. the liquid water system on or in Earth
- 9. the frozen area around the North Pole
- 11. a cloud of dust and gas in space
- 12. center of our solar system
- 13. the amount of space an object occupies
Down
- 1. the amount of material in a given space
- 3. the rocks and rock-like structures of Earth
- 5. the frozen water on or in Earth
- 6. a ball shape with equal distance from center
- 8. all the life on or in Earth
- 10. the amount of material in an object