Across
- 2. This will change to a color that is a characteristic of a specific pH (2)
- 6. More than 100 mg/day (1)
- 11. These circulate through the body to cells (1)
- 12. A chemical that produces basic substances, pH level above 7 (1)
- 13. Way of comparing relative acidity of a substance (2)
- 14. Pesticides get more concentrated as they go up the food chain (1)
- 17. Required on most vehicles to reduce harmful emissions (2)
- 19. Pesticide that killed many bugs, mosquitoes and used during WWII (1)
Down
- 1. food grown without the use of pesticides or unnatural chemicals (2)0
- 3. The process of adding calcium carbonate to the environment is called this (1)
- 4. Color changes when a acid or base reacts with this (2)
- 5. Element Less than 100 mg/day (1)
- 7. Best known indicator (1)
- 8. A reaction were oxygen mixes with other chemcials forming a new substance (1)
- 9. You put this on your fields to help your crops grow (1)
- 10. a substance that can absorb or capture oxides (1)
- 15. A chemical that produces acidic substance, pH level below 7 (1)
- 16. Used on crops to control pests (1)
- 17. A substance that speeds up a chemical reaction without being used in the reaction (1)
- 18. Very good for your bones (1)