Chemistry Review

5. a natural process that converts a refined metal into a more chemically stable oxide
6. a process in which one or more substances, the reactants, are converted to one or more different substances, the products
8. a chemical process in which a substance reacts rapidly with oxygen and gives off heat
9. air pollution control devices that use liquid to remove particulate matter or gases from an industrial exhaust or flue gas stream
10. something that threatens people with food and water scarcity, increased flooding, extreme heat, more disease, and economic loss
13. kills unwanted plants
14. The Workplace Hazardous Materials Information System
15. a reaction where an acid reacts with an alkali to form a neutral solution of salt and water.
16. synthetic substance composed of very large molecules

1. accompanied by or requiring the absorption of heat.
2. gases carbon dioxide, methane, nitrous oxide, and water vapor (which all occur naturally), and fluorinated gases (which are synthetic).
3. the degree of mixture with base metals
4. a textile fiber
7. when sulphur dioxide and nitrogen oxide emissions transform into secondary pollutants
11. a process or reaction that releases energy from the system to its surroundings
12. kills unwanted pests