Across
- 2. to separate things
- 4. harmful things added to the environment
- 6. how clean or uncontaminated something is
- 8. it keeps things working even when it’s hot
- 9. related to heat
- 14. A recycling sister
- 15. a large area where trash is buried
Down
- 1. a type of enzyme that breaks molecules apart
- 3. a “machine” made of proteins
- 5. rotting plant or food waste that becomes soil
- 7. the code inside all living things
- 10. so small that it can only be seen with a microscope
- 11. substances change into something new
- 12. to melt or change the shape of something
- 13. a particle that makes up everything