Across
- 8. toxins becoming more concentrated as they ascend a food chain
- 10. a substance with a PH greater than seven
- 11. a mixture of plant compounds extracted from lichen
- 13. a chemical that kills weeds
- 15. a chemical that kills insects
- 17. a nutrient that doesn't dissolve in water
Down
- 1. a chemical that kills pests
- 2. a chemical in food used for energy, growth, and cell repair
- 3. a a nutrient that is made of a chain of amino acids
- 4. a chemical that kills diseases
- 5. a mineral which the body needs less than 100 mg
- 6. a molecule that helps enzymes function
- 7. a nutrient made of carbon, hydrogen and oxygen
- 9. a scale that measures the acidity or alkalinity of a substance
- 12. a substance with a PH less than seven
- 14. dichlorodiphenyltrichloroethane
- 15. a substance than changes colour to indicate whether a substance is acidic or basic
- 16. a protein that regulates chemical reactions in the body