Physics fun!

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Across
  1. 6. What is the opposite of matter
  2. 8. Lighting bending as it enters another entity is called ______
  3. 10. The electric ____ can produce around 500 volts
  4. 12. What is the hardest known substance
  5. 14. Electric current is a flow of _____
  6. 15. What type of circuit has more than one path
Down
  1. 1. Where does sound travel faster
  2. 2. A "Newton" is a measurement of what
  3. 3. The stratosphere is 50 km ______ the troposphere
  4. 4. ______ is 3 times hotter than the sun
  5. 5. How does static electricity build up when walking on a carpet
  6. 7. What is the name of the layer of air closest to us in the atmosphere
  7. 9. _____ water freezes faster
  8. 11. Gravity can be so strong that it can even pull ____
  9. 13. The eiffel tower is _____ in the summer