Biology

4. A set of rules that must be followed at all times in the science classroom
6. all the living and nonliving things in an area
7. An explanation of what you observe based on past experience
9. To bind legally or morally; it is your duty to do it
10. A one sentence answer to a scientific question that does not give explanations
11. The average of a group of numbers
12. An idea that supports a natural phenomena
15. Any factor that can be controlled, changed, or measured in an experiment.
17. Standards by which something may be judged or decided
19. A graph that shows trends and data over time
20. Being the only one of its kind; unlike anything else
21. The state of being one, having the same characteristics

1. An interacting group of various species in one location
2. A colorless, odorless gas in the air that we breathe
3. The amount of a substance in a given volume
5. A non-living component of the environment
8. Something that is detected or measured with any of the 5 senses
13. A set of specific steps to be followed in order to complete a lab
14. A process plants use to produce food from carbon dioxide and water
16. Provides the claim with supporting details from evidence, and scientific background
18. A living component of the environment