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