Across
- 2. , Energy stored in food
- 5. Spreading out of energy
- 7. A device that makes work easier
- 9. that forms salt and water
- 11. Energy that travels as waves through air
Down
- 1. Force that pulls objects towards Earth
- 3. Gas that gives a squeaky pop
- 4. Resistance force between surfaces
- 6. , Rearrangement of particles
- 8. Insoluble solid formed in reactions
- 10. , Fastest medium for sound