Activity 2

5. is a pure substance.
7. the protective blanket of gases surrounding the Earth.
8. is done when force is applied to an object over a distance.
10. study of microscopic organisms.
15. is the main element in organic compounds.
17. the energy that it possesses due to its motion.
19. study of plant/life.
20. A suggested explanation based on evidence that can be tested by observation.
22. study of life and living organisms, their life cycles, adaptations, and environment.
24. a substance that forms because of a chemical reaction.
26. Where life operates.
28. Environmental geology.
29. is the ability to do work.

1. Stored energy that depends upon the relative position of various parts of a system.
2. the outer mantle of the solid earth.
3. is the smallest particle of an element that still has the properties of that element.
4. is the study of energy.
6. the concentration of hydronium ions in a solution.
9. a substance that starts a chemical reaction.
11. is the rate at which energy is used.
12. The process of scientific investigation.
13. the sum of all the biochemical reactions in an organism.
14. the study of inanimate natural objects.
15. study of atmosphere and weather patterns.
16. A test that is used to rule out a hypothesis.
18. comprises all types of water resources.
21. is anything that takes up space and has mass.
23. is a substance that consists of two or more elements.
25. A widely accepted hypothesis that stands the test of time.
27. The study of the interactions between life and its physical environment.