Across
- 1. Outer layer of the Earth.
- 2. Organ that pumps blood in the human body.
- 4. Device that magnifies small objects.
- 6. Simplest form of matter.
- 7. Force that pulls objects toward the center of the Earth.*
- 9. Process where plants make their own food.
Down
- 1. Gas essential for photosynthesis
- 3. Solid form of water.
- 5. Energy from the sun
- 8. Unit of measurement for electrical resistance.