Across
- 5. all water on earth
- 6. rocks from hot molten lava that crystalizes and solidifies
- 11. a land area channeling rain/snowmelt to streams, rivers to outflows like reservoirs, bays, ocean
- 12. all life on earth
Down
- 1. a thin layer of gas from the soil up
- 2. layer of soil surrounding the earth
- 3. from rock below the soil to earth's core
- 4. when large populations of organisms die
- 7. when large portions of the earth are covered by ice sheets
- 8. rocks created from weathering, dissolution, precipitation, and lithification
- 9. a mountain building event
- 10. rocks created from heat and pressure