Across
- 4. needed by all known forms of life.
- 5. type of biochemical reactions that breakdowns molecules into smaller units and release energy.
- 8. is a pure substance.
- 9. A widely accepted hypothesis that stands the test of time. Theories are oftentested and usually not rejected.
- 10. ability to do work.
- 13. a compound found mainly in living things.
- 16. are tiny units that make up all matter in the universe and energy what holds the nucleus together.
- 18. these reactions build up bigger molecules from smaller ones.
- 20. the sum of all the biochemical reactions in an organism.
- 21. comprises all types of water resources oceans, lakes, seas, rivers, streams, reservoirs,icecaps, glaciers, and groundwaters.
- 23. organized body of knowledge that is obtained by study and experimentation.
- 25. developing knew knowledge based upon old knowledge.
- 26. a test that is used to rule out a hypothesis or validate something already known.
- 27. unit work of energy in the International System of Units.
Down
- 1. a force that holds molecules together.
- 2. the concentration of hydronium ions in a solution.
- 3. where life operates.
- 5. is the main element in organic compound.
- 6. the unit of power.
- 7. is the study of energy.
- 10. The study of the interactions between life and its physical environment.
- 11. Is a a substance that consist of two or more element
- 12. a substance that starts a chemical reaction.
- 14. the energy needed to start a chemical reaction.
- 15. anything that takes up space and has mass.
- 17. the outer mantle of the solid earth.
- 18. the protective blanket of gases surrounding the earth.
- 19. the rate at which energy is used.
- 22. a substance that forms as a result of a chemical reaction.
- 24. it is a latin word that means knowledge.