HALF LIFE

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Across
  1. 3. A reflected sound
  2. 4. Unit of electrical resistance
  3. 5. Bends light to form an image
  4. 6. carries energy without carrying matter
  5. 8. Force that pulls objects toward Earth
  6. 9. Measure of disorder in a system
  7. 11. SI unit of magnetic flux density
  8. 13. Amount of matter in a body
Down
  1. 1. Unit of electric potential difference
  2. 2. PARTICLE OF LIGHT
  3. 3. Capacity to do work
  4. 7. Path of one body around another
  5. 10. Splits white light into a spectrum
  6. 12. Smallest unit of an element