Across
- 4. Dirty or harmful things in the air, water, or soil.
- 8. How hot or cold something is.
- 9. Soil made from plant parts that have broken down naturally.
- 10. The “instruction book” inside all living things.
- 12. system where materials are reused over and over without becoming trash.
- 14. So small you need a microscope to see it.
- 15. Able to work well at different temperatures.
Down
- 1. Something that can be done without harming the environment.
- 2. tiny “machine” in living things that makes chemical reactions happen faster.
- 3. Things that are thrown away or no longer needed.
- 5. down split something into smaller pieces.
- 6. What makes things work, move, or change.
- 7. To turn used things into new things instead of throwing them away.
- 11. very tiny particle that everything is made of.
- 13. An object used to hold or store things (like a box or plastic cup).