Speed And Elements And Atoms

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Across
  1. 3. a device to tell the speed of a moving vehicle
  2. 5. number of elements that form gas
  3. 8. a vehicle that broke the land sped record
  4. 9. a change by an object which is reversible
  5. 10. _________ stops the speedometer from spinning
  6. 11. gates that help determining the speed of a moving vehicle
  7. 14. a change that happens in a reaction which is irreversible
  8. 15. ________=distance/time
  9. 16. sparkles that make the sky look beautiful
  10. 17. distance the amount of area covered by an object after a certain period of time
Down
  1. 1. a bunch of atoms join together to form ____
  2. 2. watch that helps determining the speed of a moving object
  3. 4. elements arranged in order are shown in a _____________
  4. 6. name the second element on the table
  5. 7. name the first element on the table
  6. 12. unlimited continued progress existence and events in the past, present and future
  7. 13. to move increasingly faster