Across
- 3. process which plants convert light energy into chemical energy
- 6. loose sand, clay, silt, and other soil particles that settle at the bottom of a body of water
- 7. layers of gases retained by Earth's gravity
- 8. chemical substance with symbol C and atomic number 6
Down
- 1. transmission of energy in the form of waves
- 2. fuel formed from natural processes
- 4. process which dead organisms are broken down
- 5. solid, outer part of the Earth