Across
- 3. eat both plants and animals
- 7. the characteristics that enable us to differentiate one material from another
- 9. energy, heat energy
- 11. molecules that are spaced out and move quickly
- 12. conceptual representation of an idea
- 13. an organism that has to eat food to live
- 14. system, system that is responsible for intake of oxygen and releases carbon dioxide
- 16. bottom of a wave
- 18. the middle point of a wave
- 19. tightly packed molecules that retain their shape
- 20. solid, liquid, or a gas
Down
- 1. a device that converts motive power (mechanical energy) or fuel-based power
- 2. molecules that slide past each other
- 4. only eat plants
- 5. top of a wave
- 6. the process by which plants make their own food
- 8. the distance between one crest and another
- 10. energy, energy of moving electrons
- 11. energy due to gravity
- 15. web, many food chains in an ecosystem
- 17. only eat meat
- 21. energy, energy stored as a result of applying a force to compress or stretch an object
- 22. pole, the strongest magnetic field towards the end of a bar magnet