Across
- 5. A substance that can be all three states of matter
- 8. A change of state that is irreversible
- 10. A change of state from a solid to a gas
- 12. A food _______ shows the transfer of energy
- 14. When an object bends light that passes through it
- 16. The region where a species has all it's needs met
- 17. A group of species that eat producers
- 19. A gooey substance that is both solid and liquid
- 20. Particles are free to move over each other
Down
- 1. When light is bounced off an object
- 2. Parts of the body of an animal that keep it alive
- 3. To take in heat or energy
- 4. A change of state from a gas to a solid
- 6. Animals that each plants and other animals
- 7. Has mass and takes up volume
- 9. A change of state that is reversible
- 11. It's energy, not matter
- 13. Particles are spread far apart
- 15. To give away heat or energy
- 18. Particles are packed close together