What's the Matter?

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Across
  1. 3. smallest basic unit of matter
  2. 5. indefinite volume, indefinite shape, particles move quickly and freely
  3. 8. made up of more than one type of substance and have parts that are easy to see and seperate
  4. 9. ________ density is at the bottom of the density tower
  5. 12. energy that is the measure of motion of particles
  6. 13. ________ density is at the top of the density tower
Down
  1. 1. the amount of matter an object has, is measure in kg and g
  2. 2. two or more atoms joined by chemical bonds
  3. 4. uniform compositions and are made up of only one type of particle
  4. 6. the amount of space a substance takes up
  5. 7. the measure of how much mass is in a given volume to determine if an object will sink or float
  6. 8. uniform compositions are made up of more than one type of substance, and are not easily separated
  7. 10. definite volume, definite shape, lowest kinetic energy
  8. 11. an object or substance that has mass and volume
  9. 13. definite volume, indefinite shape, particles move around each other