Across
- 3. Pure substance consisting of only one type of atom.
- 6. Basic unit of life.
- 7. Substance made of two or more elements chemically combined.
- 10. Device used to measure temperature.
- 11. The center of an atom containing protons and nuetrons
- 12. State of matter with no definite shape or volume.
- 13. Tiny infectious agent that can only replicate inside living cells.
Down
- 1. Type of energy from sources like the sun and wind.
- 2. Unit of force named after a famous English scientist.
- 4. State of matter with a definite shape and volume.
- 5. Variety of different types of life in an ecosystem.
- 8. Process by which plants make food using sunlight.
- 9. Body's ability to resist infections and diseases.