Across
- 2. Center of an atom
- 5. The powerhouse of a cell
- 7. Smallest type of cell that can only be seen with a powerful microscope
- 9. The change from solid to liquid
- 11. Liquid that is liquid at room temperature
- 12. Hardest natural substance
- 15. Force that pulls us to Earth
- 16. Liquid with chemical symbol H2O
Down
- 1. Device used for measuring temperature
- 3. The basic unit of life
- 4. Biggest planet in our solar system
- 5. Planet known as the Red Planet
- 6. Chemical symbol for gold
- 8. What is the transfer of energy involving volume (how loud it is)?
- 9. Planet closest to the sun
- 10. Something lacking light and having a high gravitational pull
- 13. What do plants release during photosynthesis?
- 14. Energy from the sun