Across
- 4. Type of reaction where carbon dioxide and water are produced
- 7. Type of reaction where an acid and a base combine
- 8. A metal (usually iron) rusts or is oxidized
- 9. 2 words Examples are coal, oil, natural gas and gasoline
- 11. Installed on smokestacks to prevent harmful products from entering the environment
- 12. Substance containing hydrogen in solution with a pH less than 7
Down
- 1. Chemical in the air that causes harm to living things or the environment
- 2. Process of applying a zinc coating to protect iron or steel
- 3. 2 words One of the key greenhouse gases that scientists are most concerned with
- 5. 2 words Gas that traps heat in Earth's atmosphere preventing heat from escaping into space
- 6. Substance usually containing hydroxide with a pH greater than 7
- 10. Compounds produced in a chemical reaction