Across
- 6. beginning substances at the start of a reaction
- 9. a substance made from two or more elements, chemically combined
- 10. always involved and needed for physical and chemical changes
- 11. state of matter in which the atoms are closest together
- 12. a mixture made up of particles that are not uniformly distributed
- 13. anything with mass that occupies space
- 14. A substance made up of atoms with the same atomic number.
Down
- 1. substances that form during the reaction
- 2. Matter with constant composition
- 3. matter with variable composition made from two or more substances
- 4. state of matter that can change shape but not volume
- 5. a process that absorbs energy from surroundings
- 7. the study of the composition, structure ,and properties of matter and the changes it undergoes
- 8. mixture made up of particles that are uniformly distributed
- 10. a process that releases energy into the surroundings