Across
- 1. a scientific explanation for a set of observations
- 3. the factors of an experiment that can change
- 4. living matter enclosed in a self-contained unit
- 5. gathering information in orderly way
- 7. groups of atoms
- 9. study of the living world
- 12. the information gathered from observations
- 13. populations that live together in a defined area
- 14. can make their own food
- 16. what a hypothesis becomes when it is well supported
- 17. using evidence to learn about the natural world
Down
- 2. used to test a hypothesis
- 4. rely on other organisms for energy
- 6. process of water changing from liquid to gas form
- 8. main source of energy for life on Earth
- 10. invented to study images too small to see with unaided eye
- 11. group of similar organisms
- 15. a community and its nonliving surroundings