Across
- 3. common chemical substance on Earth
- 5. excess water that flows across land
- 12. All biochemical reactions in an organism
- 14. the branch of biology that deals with the relations of organisms to one another and to their physical surroundings.
- 15. pH higher than 7
- 16. the solid outer mantle of Earth
- 19. pH lower than 7
- 20. A metabolic process where cells get energy (ATP) by using oxygen and releasing carbon dioxide from breaking down organic substances.
- 21. the ability to do work
- 22. the science that deals with the earth's physical structure and substance, its history, and the processes that act on it.
- 23. has mass and takes up space
- 26. breaking down of rocks and minerals
- 28. study of energy
- 29. all types of water resources
Down
- 1. a pure substance
- 2. substance formed after a chemical reaction
- 4. where life operates
- 6. found in water, soil, sediments
- 7. removal of material via water
- 8. essential in organic compound
- 9. dependence on natural resources
- 10. made two or more elements
- 11. Substance that reacts in a chemical reaction
- 13. return to earth via rain
- 17. body of knowledge from study and experiment
- 18. done when force is applied over distance
- 24. concentration of hydronium ions
- 25. the protective blanket of gases
- 27. smallest particle of an element
- 30. rate at which energy is used