science

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Across
  1. 1. a number placed in front of an element symbol or chemical formula in an equation
  2. 3. stored energy
  3. 4. the amount of matter in an object
  4. 6. occurs when one substance reacts to another
  5. 10. the mass per unit volume of a substance
  6. 12. a charachteristic of matter that can be observed
  7. 15. could be hot or cold
  8. 18. more energy is released when the products form than is required
  9. 19. energy due to motion
  10. 20. occurs when substances react with oxidizing agents changing it to a new substance
  11. 22. the amount of force per unit area applied to an objects surface
  12. 23. the amount of space an item takes up
  13. 25. more energy is required to break the bonds of the reactants
Down
  1. 2. the ability to burn
  2. 5. matter with a composition that is always the same
  3. 7. from a liquid to a gas
  4. 8. two or more atoms that are held together by convalent bonds
  5. 9. when atoms form new bonds
  6. 11. a starting substance in a chemical reaction
  7. 13. the energy released when atoms form bonds
  8. 14. the result of the motipon of all the particles heating the substance up
  9. 16. a substance produced by a chemical reaction
  10. 17. a substance containing one or more different elements chemically bonded together
  11. 21. smallest thing in the universe
  12. 24. consists of only one type of atom