Physics words

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Across
  1. 2. It includes X-rays, radio waves and micro waves
  2. 4. It is measured in herz
  3. 5. Zero mass and travels at the speed of light
  4. 7. Created by the movement of charged particles, such as electrons
  5. 10. It does not emit, absorb or reflect light, but can only be detected through its gravitational effects on other objects
  6. 11. Formed after the collapse of a star
  7. 12. Named after the Italian physicist who invented the battery
  8. 13. Unit of electrical resistance
  9. 14. The smallest unit of an element
  10. 15. Measure of how much mass is contained in a given volume of a substance
  11. 17. Measures air pressure
  12. 18. Keeps planets in orbit
Down
  1. 1. Determines the color of light and the pitch of sound
  2. 3. the rate at which an object's velocity changes over time
  3. 6. branch of physics that deals with the relationships between heat, energy, and work
  4. 7. It is equal to an object's mass multiplied by its velocity
  5. 8. It is described by Newton's law of motion
  6. 9. The force that opposes the motion of an object
  7. 16. the property of a system that enables it to do work