Across
- 4. primary source of energy for all things on Earth
- 5. all living things on Earth are in this sphere.
- 6. (two word answer, put a _ between)resources that can easily be replenished
- 9. (two word answer, put a _ between)the type of system that allows energy in and out but not matter.
- 10. (two word answer, put a _ between)resources that cannot be replenished easily
Down
- 1. (two word answer, put a _ between) The system that allows energy and matter to move in or out.
- 2. the solid earth with the crust, mantle and cores.
- 3. all water on earth goes into this sphere.
- 7. the physical and biological world that occurs naturally on earth.
- 8. the thin layer of gases around our planet keeping us alive.