Flex-, Flect-, Fract- and Frag- Words

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Across
  1. 3. Contortionists have this trait
  2. 5. it can happen to your bone
  3. 7. a small piece on a vehicle reflecting light in a certain direction
  4. 8. you learn about them in maths
  5. 9. a piece of chemical engineering or laboratory equipment
Down
  1. 1. capable of changing the direction of light
  2. 2. a folded paper figure
  3. 4. a small broken part
  4. 5. consisting of small disconnected parts
  5. 6. the right to vote