Activity 2

5. is done when force is applied to an object over a distance.
8. is a substance that consists of two or more elements.
9. is the main element in organic compounds.
11. study of microscopic organisms.
13. is the ability to do work.
15. study of plant/life.
17. Method The process of scientific investigation.
19. is the smallest particle of an element that still has the properties of that element.
21. Energy Stored energy that depends upon the relative position of various parts of a system.
22. Where life operates.
24. the protective blanket of gases surrounding the Earth.
25. A widely accepted hypothesis that stands the test of time.
26. comprises all types of water resources.
27. the concentration of hydronium ions in a solution.
28. a substance that starts a chemical reaction.
30. Energy the energy that it possesses due to its motion.

1. A test that is used to rule out a hypothesis.
2. The study of the interactions between life and its physical environment.
3. a substance that forms because of a chemical reaction.
4. the sum of all the biochemical reactions in an organism.
6. is anything that takes up space and has mass.
7. is the rate at which energy is used.
10. Science the study of inanimate natural objects.
12. study of atmosphere and weather patterns.
14. Environmental geology.
16. the outer mantle of the solid earth.
18. A suggested explanation based on evidence that can be tested by observation.
20. is the study of energy.
23. Science study of life and living organisms, their life cycles, adaptations, and environment.
29. is a pure substance.