Across
- 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
Down
- 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.