Across
- 4. a layer in the atmosphere, also a layer od solid mantle within the earth
- 5. the place from which something comes
- 6. a quantity or thickness of a material, one of many
- 8. the regions on and in earth occupied by living organisms
- 10. strength, vitality or power to do work
- 12. the layer of gasses surrounding the earth
- 13. a series of events that happen in the same order and repeat in that order
- 14. rigid crust and upper mantle of earth
Down
- 1. all the waters on the earth's surface
- 2. upper mantle of earth, convection occurs
- 3. a fact, person or event that is observable
- 7. movement in a liquid caused by heat
- 9. move from one place to another
- 11. a supply of something needed, used, or renewed