crossword

3. mixture of pollutants made up mostly of ground level ozone.
6. the purposeful clearing of forested land
11. the cultivation of a single crop in a given area.
14. an artificial lake where water is stored
15. process that occurs when energy from a planet's host star goes through its atmosphere and warms the planet's surface,
16. safe to drink
17. lands on which the native vegetation plants considered collectively, especially those found in a particular area or habitat.
18. the weather conditions prevailing in an area in general or over a long period.
19. measure of magnetization that a material obtains in response to an applied magnetic field

1. the geological process in which earthen materials are worn away and transported by natural forces such as wind or water
2. the percentage of void space in a rock.
4. a fertile soil of clay and sand containing humus.
5. underground layer of water-bearing permeable rock
7. emission or transmission of energy in the form of waves or particles through space or through a material medium
8. a colorless unstable toxic gas with a pungent odor and powerful oxidizing properties, formed from oxygen by electrical discharges or ultraviolet light. It differs from normal oxygen (O2) in having three atoms in its molecule
9. a chemical or natural substance added to soil or land
10. the envelope of gases surrounding the earth or another planet.
12. any area of land where precipitation collects and drains off into a common outlet, such as into a river, bay, or other body of water.
13. water present beneath Earth's surface in rock and soil pore spaces and in the fractures of rock formations