Physics Key words

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Across
  1. 2. the rate how fast something is
  2. 6. elements that have ubnsable atoms
  3. 9. distance between two similar points
  4. 10. it contains protrons and neutrons
  5. 12. the measurment energy is measured in
Down
  1. 1. particles tightly packed together/compressed
  2. 3. something that is passses through eg microwaves and light
  3. 4. the force of movement
  4. 5. the time it takes half a radioactive material to decay
  5. 7. same element with different number of neutrons
  6. 8. is the heat transfer in solids
  7. 11. 1000000