Across
- 1. A long,narrow groove that forms where water,lava or other liquid flows.
- 7. the bottom number in a fraction
- 10. the sphere of earth/rock
- 12. the sphere of air
- 15. scientists who study Earth
- 16. the sphere of water
- 19. a liquid that forms seas,lakes,rivers,and rain
- 20. a part of a whole number including a numerator and denominator.
Down
- 2. where living things are able to live.
- 3. the sphere of life
- 4. a comparison of two quantities
- 5. the planet known as the red planet
- 6. the biggest gas planet
- 8. the top number in a fraction
- 9. the size,length,or amount of something
- 11. the planet closest to the sun
- 13. A group of parts that interact.
- 14. planet planets made of helium/hydrogen
- 17. planet planets made of rock/with a solid surface
- 18. magma that emerges into liquid and comes out of a volcano