Across
- 1. Relating to the wind
- 3. Green plants use sunlight to make their own food
- 5. Giant pieces of earth's crust
- 7. The surroundings or conditions in which a person, animal, or plant lives or operates
- 9. Parts of earth where life exists
- 10. The movement of humans from one place to another
- 11. Layers of gases surrounding a planet
- 12. Water 'running off' the land surface
- 13. Solid material that is moved and deposited in a new location
Down
- 2. Earthen materials are worn away and transported by natural forces such as wind or water
- 4. The total amount of water on a planet
- 5. The evaporation of water from plants
- 6. The solid outer part of Earth
- 8. The dying out or extermination of a species
- 13. Able to be maintained at a certain rate or level