Across
- 1. building blocks of matter
- 3. two or more substances that are easily mixed
- 4. any characteristic of matter that you can observe or measure without changing into a new substance
- 8. negatively charged particle
- 11. any change that causes a new substance to form
- 13. positively charged particle
- 14. particle with no charge
Down
- 2. combination of two or more substances
- 4. change in which no new substances are formed
- 5. describes how a substance reacts
- 6. anything that has mass and takes up space
- 7. made of only one kind of atom
- 9. center of an atom
- 10. made of two or more atoms joined together
- 12. two or more substances that are not easily mixed