Chemistry

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