Across
- 3. * Energy is the energy in the nucleus of the atom.
- 6. Where life operates.
- 9. * Energy is often measured in calories.
- 10. Is anything that takes up space and has mass.
- 12. Provides energy to cells.
- 15. The protective blanket of gases surrounding the Earth.
- 16. Electrical energy is generally expressed in * hours.
- 17. Helps cells keep their shape.
- 19. The act of noting or detecting phenomenon by the senses.
- 20. The study of the interactions between life and its physical environment.
- 21. A suggested explanation based on evidence that can be tested by observation or experimentation.
- 24. James * Joule
- 25. The * energy of an object is the energy that it possesses due to its motion.
- 26. Stores energy and forms cell membranes.
- 27. The energy needed to start a chemical reaction is called * energy.
Down
- 1. It is needed by all life forms.
- 2. A solution with a pH higher than 7.
- 4. Is the ability to do work.
- 5. The sum of all the biochemical reactions in an organism.
- 7. A solution with a pH lower than 7.
- 8. Is the unit of power.
- 9. Thermal or * Energy
- 11. A substance that starts a chemical reaction.
- 12. "Energy cannot be * or destroyed.
- 13. Is the rate at which energy is used.
- 14. Is done when force is applied to an object over a distance.
- 17. A substance that forms as a result of a chemical reaction.
- 18. Is the study of Energy.
- 22. A chemical substance may be either an * or a compound.
- 23. the concentration of hydronium ions in a solution.