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Across
  1. 6. The small number showing how many atoms in a formula.
  2. 8. A reaction that takes in heat.
  3. 9. A change that creates one or more new substances.
  4. 11. An equation where the atoms don't match on both sides.
  5. 13. The force particles create when they hit the walls of a container.
  6. 17. An equation where the number of atoms is the same on both sides.
  7. 19. A solid formed when two solutions react.
  8. 21. When a gas cools and becomes a liquid.
  9. 23. What happens when particles move apart when heated.
  10. 24. When metals react slowly with air or water.
  11. 26. When a liquid turns into a solid.
  12. 27. A chemical equation written in words.
Down
  1. 1. A reaction that gives off heat.
  2. 2. A change that does not create a new substance.
  3. 3. The big number showing how many molecules or units.
  4. 4. A reaction in plants that makes glucose from sunlight.
  5. 5. The amount of matter in an object.
  6. 7. A chemical equation using symbols and formulas.
  7. 10. A burning reaction with oxygen.
  8. 12. A reaction in cells that releases energy from glucose.
  9. 14. When a solid changes straight into a gas.
  10. 15. The substance made in a reaction.
  11. 16. A state of matter that spreads out to fill any space.
  12. 18. What happens when particles come closer when cooled.
  13. 20. The starting substance in a reaction.
  14. 22. When a liquid turns into a gas.
  15. 25. A state of matter that flows and takes the shape of its container.