topic 1-3 vocab

1. a pH value of more than 7
3. a mineral that the body requires in the amount of 100 mg/day or more in order to maintain health
5. a chemical used to control weeds
6. a chemical reaction in which oxygen combines with other elements to form new substances
8. paper saturated with a chemical to show wether a substance is acidic or basic
10. rain or snow containing acid compounds in the air
14. a chemical that changes colour to indicate wether a substance is an acid or base
15. having a pH value less than 7
17. a chemical used to control holds and fungi

1. the process whereby chemicals accumulate in the tissues of organisms along the food chain
2. a mixture of plant compounds used as a chemical indicator
4. an organic nutrient that does not dissolve in water
7. a chemical in food, used for energy, growth, body building, or cell repair
8. a scaled that measures that acidity or alkalinity of a substance
9. a molecule that helps enzymes function in the body
11. and organic nutrient made of carbon, hydrogen, and oxygen
12. an organic nutrient composed of a chain of amino acids
13. a special protein molecule that regulates chemical reactions in living organisms
16. the process of adding calcium carbonate to the environment