Environmental Science

2. essential for plant growth
6. instrument use to measure the surface temperature
7. home to diverse ecosystems that prevent soil erosion and flooding
8. good effect
10. the mode of contact made with hazardous substance
11. also known as underground mining
14. the study how poisonous substances affect health
16. measure of water vapor content in air
17. a waste product generated by mining
18. digging a large hole to remove ore and rock
20. the process of measuring the chance that an environmental hazard will cause harm

1. any substance that is toxic, corrosive, is an irritant, and flammable
3. instrument used to determine relative humidity
4. a pure substance that cannot be broken down during chemical reaction
5. moderately toxic
9. any substance that may be harmful to human health if inhaled, swallowed, or absorbed through the skin
12. the amount of a substance needed to cause a response
13. naturally occurring, inorganic solid that has an orderly crystalline structure and a definite composition
15. an action taken in advance to prevent from harm or danger
19. a disease that has appeared in the human population for the first time.