science cross word puzzle

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Across
  1. 2. change changes affecting the form of a chemical substance
  2. 4. propertie a property (as color, hardness, boiling point) of matter not involving in its manifestation a chemical change
  3. 6. changes a usually irreversible chemical reaction involving the rearrangement of the atoms of one or more substances
  4. 8. is defined as a state of matter consisting of particles that have neither a defined volume nor defined shape
  5. 9. is a material made up of two or more different chemical substance/substances which are not chemically combined
  6. 10. a group of atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction
  7. 12. any substance composed of identical molecules consisting of atoms of two or more chemical elements
  8. 13. material substance that constitutes the observable universe
Down
  1. 1. changing into a gas when energy is added
  2. 3. any substance that cannot be decomposed into simpler substances by ordinary chemical processes
  3. 4. substance a sample of matter with both definite and constant composition and distinct chemical properties
  4. 5. is one of the states of matter
  5. 6. properties a particular substance that can be observed in a chemical reaction
  6. 7. smallest unit into which matter can be divided without the release of electrically charged particles
  7. 11. one of the three basic states of matter, the others being liquid and gas