Across
- 4. The process of making or creating something new.
- 5. A measure of how hot or cold something is.
- 7. Turning used materials into new products.
- 9. protein that speeds up chemical reactions in living things.
- 10. Able to be maintained long-term without harming the planet.
- 11. degradation The process of breaking plastic down into smaller, simpler molecules.
- 12. A group of atoms bonded together; the smallest unit of a chemical substance.
- 14. Decayed organic material used as fertilizer.
- 15. system A system where materials are reused over and over without becoming waste.
Down
- 1. The process of separating something into smaller parts.
- 2. Everything around us: air, water, soil, plants, animals, and humans.
- 3. molecules Clean, separated molecules with no contamination.
- 6. Able to work well even at high temperatures without breaking down.
- 8. Materials that are thrown away because they are no longer needed.
- 13. reaction A process where substances change into new substances.