Across
- 2. Rock that contains metal or valuable minerals
- 5. Substances burned to produce energy
- 7. Flow of electrons that powers devices
- 11. Substance made by bees or used in candles
- 12. Small hard seed used for food
- 13. Tall, slender grass often found near water
- 14. Basic building blocks of matter
- 15. Preserved remains of ancient organisms
Down
- 1. Black rock used as fossil fuel
- 3. Power that can be used to do work or cause change
- 4. Naturally occurring solid substances from Earth
- 6. Planting seeds in soil
- 8. To make or become different
- 9. Gathering crops from the fields
- 10. A foot-operated lever on a bike