Across
- 4. provides shape and structure to plant cells
- 7. the ability of one substance to dissolve in another
- 8. the protein factory in the cell
- 9. the site of photosynthesis in plant cells
- 12. has a definite shape and volume
- 14. The variable that we change
- 16. The control center of the cell
- 18. the smallest unit of an element
- 19. the ability to be drawn into wires
- 20. A positively charged particle in the atom
- 22. shiny conduct heat and electricity
- 23. do not react with other elements
Down
- 1. the first step in the scientific method is to state the blank
- 2. the ability to be rolled or pounded into sheets
- 3. the name for parts of cells
- 4. reduces the activation energy energy for a reaction
- 5. negatively charged particles surrounding the nucleus of the atom
- 6. a scientific or educated guess
- 10. properties that can be observed or changed without changing the identity of the matter
- 11. an example of a chemical property
- 13. the variable that changes because of what we change
- 15. something that changes
- 16. particles with no charge in the atom
- 17. something that stays the same
- 21. cannot be separated or broken down by chemical means