Across
- 2. Smallest unit of matter
- 4. Separates particles based on density and size
- 7. Larger or smaller representation of an item
- 8. Controls what goes in and out of cell
- 9. Gel-like substance between nucleus and membrane
- 11. Combination of atoms to form a substance
- 12. Movement of particles from high concentration to low concentration
- 13. Group of cells of same kind that do a specific job
- 15. Semi-solid layer directly below crust
- 16. Negatively charged particles in an atom
- 18. Basic unit of living things
- 19. Structure composed of two or more types of tissue
- 20. Group of organs that work together to do a certain job
Down
- 1. Anything that takes up space
- 3. Amount of space an amount of matter occupies
- 5. Neutrally charged particles in atoms
- 6. Support plant cells and makes them rigid
- 9. Two center layers of Earth, inner is solid, outer is molten
- 10. Layers of air that surround Earth
- 12. Amount of matter in a given volume (m/v)
- 14. positively charged particles in atoms
- 15. Amount of matter, measured in grams
- 17. Control center of cell
- 18. Solid outer layer of Earth