Across
- 4. The degrees of hotness or coldness in an object
- 8. A substance that can't be broken
- 10. The amount of space in an object
- 11. The smallest unit in an element
- 12. you need this to do things
- 13. change in matter that doesn't affect its chemical composition
- 15. The amount of matter in an object
- 16. when a new substance was made
Down
- 1. The substances that are formed during a chemical reaction
- 2. Material that has mass and takes up some amount of space
- 3. 2 or more atoms joined together
- 5. A combination of 2 or more substances
- 6. The study of changes in matter
- 7. A chemical reaction that absorbs heat energy
- 9. The transfer of thermal energy
- 12. Chemical reaction that gives off heat energy
- 13. A characteristic that can be observed
- 14. A pure substance that forms when 2 or more different elements combine