Nature of science

3. A community of living things interacting with their non-living environment.
8. The process plants use to turn sunlight, water, and carbon dioxide into food and oxygen.
10. A step-by-step way that scientists solve problems and answer questions.
11. A rule that describes a repeatable pattern in nature.
15. A group of similar living things that can mate with each other and produce offspring.
17. Any living thing, such as a plant, animal, or bacteria.
19. The weather conditions in an area over a long period of time.
20. An animal that is hunted and eaten by another animal.

1. The natural home where an animal or plant lives.
2. An educated guess often written as an "If... then..." statement.
4. The smallest unit of life.
5. A close relationship between two different species where at least one benefits.
6. The process by which populations of living things change over long periods of time.
7. To wear away rock or soil over time by natural forces like water, wind, or ice.
9. A kingdom of organisms that absorb nutrients from dead matter.
12. The tiny building block of all matter.
13. The preserved remains of ancient living things.
14. The conditions that can change or be changed during a science experiment.
16. An animal that hunts and eats other animals for food.
18. A tested explanation of why something happens in nature, backed up by evidence.