Inventions and Technology Unit 2 Vocabulary Review

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Across
  1. 2. movement of an airplane up and down as it moves forward
  2. 7. combination of rocket fuel and oxidizer in a rocket engine
  3. 11. for every action there is an equal and opposite reaction
  4. 13. a quick burning or explosion of fuel
  5. 16. stone at the top of an arch bridge
  6. 17. backward force generated by friction with air molecules
  7. 20. an airplane moving right or left
  8. 21. upward force generated by air flowing faster over the top of a wing than under it
  9. 22. downward force generated by gravity
  10. 24. series of blades that turn when hot gases push against them
  11. 27. as a fluid increases in velocity it decreases in pressure
  12. 29. shape whose top surface is rounded and thus longer than the bottom surface
  13. 30. power needed to move an aircraft forward
  14. 31. scientific instruments sent to explore objects in space
  15. 32. train that travels underground
Down
  1. 1. fuels that are liquid only at extremely low temperatures under great pressure
  2. 3. bridge that uses a series of triangles to spread out the force
  3. 4. material that supplies oxygen for combustion
  4. 5. movement of airplane wheels tipping side to side
  5. 6. use of repelling magnets to move a train (MagLev)
  6. 8. fourth stroke of an internal combustion engine that pushes out any unburned fuel and gases that resulted from the combustion
  7. 9. bridge that splits and can be lifted up to allow traffic to pass beneath the bridge
  8. 10. an aircraft that flies without a pilot
  9. 12. official term for a drone
  10. 13. second stroke of an internal combustion engine that compresses the air/fuel mixture
  11. 14. official term for a drone and its control system
  12. 15. first stroke of an internal combustion engine that takes in fuel mixed with air
  13. 18. any vehicle fuel not derived from petroleum (i.e. not gasoline or diesel)
  14. 19. fuels composed of two chemicals that ignite when they come in contact with each other
  15. 23. train that travels on rails built above the ground
  16. 25. third stroke of an internal combustion engine that forces the piston down as the fuel explodes
  17. 26. material that reduces friction
  18. 28. anything in a regular orbit around the earth