Across
- 2. _____________ nutrients are carbon-based compounds such as carbohydrates, proteins, lipids and vitamins
- 7. Minerals that we need 100mg/day of or more
- 10. The increase in concentration as toxins move up in the food chain
- 14. ________________ nutrients are also known as minerals
- 15. A substance that causes no change to litmus paper
- 17. Molecules that help regulate the chemical reactions in living organisms
- 19. Have a pH between 0 and 6.9
- 20. The use of living organisms to control or remove the presence of pollutants from the environment
- 22. An insecticide originally used in WWII for malaria control
- 23. The first element listed in the numbers on a bag of fertilizer
- 24. The element in a fertilizer that protects against disease
Down
- 1. Provide energy for metabolism
- 3. mg/kg
- 4. Organisms whose presence or absence gives clues as to the amount of pollution affecting an ecosystem
- 5. Acid Precipitation occurs when ____________ and nitrates combine with moisture in the air to produce rain or snow with lower than normal pH
- 6. Waste that breaks down slowly or not at all
- 8. Storage for unused energy
- 9. A pesticide that targets weeds
- 11. When we combine an acid and a base in order to create water and salt
- 12. ____________ toxicity occurs when symptoms develop after just one exposure
- 13. Structural molecules for the body
- 15. Compounds or elements that are essential for production of the organic matter that makes up living organisms
- 16. Essential components of enzymes and vitamins
- 18. The dose of a substance needed to kill 50 percent of the population it is applied to
- 20. Form OH- ions in a solution
- 21. An element that is part of the thyroid hormone