Physical Geography

2. Atmospheric ____ is the weight of the earth's atmosphere pushing down on every surface unit.
4. _____ Oxide is commonly known as laughing gas.
9. Relating to things in the environment that are not living.
10. An ecosystem of land-based communities of living organisms and their non-living environment.
11. Number of Biomes
13. Short-term atmospheric conditions.
14. An energy that comes from natural sources
16. _____ Change is often attributed to human activities.

1. Burning ____ fuels produces carbon dioxide.
3. A type of renewable energy that comes from sunlight.
5. Biome with tall sparse trees, dry soil, low precipitation and hot temperatures.
6. The ____ effect makes the earth warmer.
7. Type of renewable energy that comes from heat inside the earth.
8. The global ecosystem that encompasses all life on earth.
12. Cold, frozen biome with limited foliage, permafrost, low precipitation & short growing season.
15. Large geographical areas characterized by climate, plants & animals