Across
- 4. regulates metabolism forms compounds that release energy
- 6. recommendations for a healthy lifestyle (two words)
- 9. a substance that absorbs oxides
- 10. mineral requirement that is 100mg or more a day
- 13. a process where a acid compounds are washed out of the air by rain or snow
- 16. a scale that measures the acidity or alkalinity of a substance
- 18. a chemical that's pH level is less than 7
- 19. the pH level of 4.2
- 20. a molecule that helps enzymes function in the body
Down
- 1. crutial part of blood cells that regulate oxygen transport
- 2. one part per billion
- 3. a chemils that produces the basic substances with the pH value more than 7
- 5. part of a plant that is suited for extracting minerals
- 7. medicine used to remove the typhus threat in World War II
- 8. process whereby chemicals accumulate in the tissues of organisms
- 11. a mixture of plant compounds used as a chemical indicator
- 12. in muscle contraction; forms bones and teeth
- 14. chemicals that reduce the amount of damage or disease to crops
- 15. a chemical in food, used for energy and growth
- 17. an organic nutrient that does not dissolve in water