4th Grade science test chap. 12

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  1. The ability to do work.
    energy
  2. When light strikes a surface and bounces off.
    Reflection
  3. When a force is used to move an object a certain distance.
    work
  4. The highness or lowness of a sound...
    pitch
  5. The measure of how much useful work a machine puts out compared to the amount of work put into it.
    efficiency
  6. The number of times a sound source vibrates in one second.
    frequency
  7. A material that transfers heat well.
    conductor
  8. The transfer of heat through space.
    radiation
  9. Name 4 simple machines.
    Wheel and axle, wedge, pulley, inclined plane, lever
  10. Give an example of kinetic energy.
    A rock rolling down a hill.
  11. Coal, oil, and natural gas are examples of...
    fossil fuels
  12. A tool that refracts light is a...
    lense
  13. A range of light waves with different wavelengths and energies.
    spectrum
  14. The force that works against motion between surfaces that touch.
    friction
  15. The energy in a sound wave...
    amplitude
  16. Name a few words that tell about position.
    above, below, right, left, north, and south
  17. A material that does not transfer heat very well.
    insulator
  18. The object being lifted or moved by a simple machine.
    load
  19. The bending of light as it passes from one material to another.
    refraction
  20. The distance an object moves in a certain amount of time.
    speed
  21. A push or pull that makes an object start moving, stop moving, speed up, slow down, or change directions.
    force
  22. The tendency of an object to stay at rest or to stay in motion.
    inertia
  23. Energy of motion is also called...
    mechanical energy
  24. A wheel with teeth.
    gear
  25. Frequency determines _____________.
    pitch
  26. What is the number of times a sound source vibrates in one second called?
    frequency
  27. What does sound carry that causes an object to vibrate and make sound.
    energy
  28. The opposite of an insulator.
    conductor
  29. A range of all light waves with varying wavelengths.
    electromagnetic spectrum
  30. Two important things you can save by using tools are...
    time and energy
  31. The transfer of energy by the flow of liquids and gases.
    convection
  32. The transfer of energy when one particle bumps into another.
    conduction
  33. The distance from the top of one wave to the top of the next wave.
    wave length
  34. An inclined plane twisted around a spiral.
    screw
  35. A simple machine that is not attached to anything, but it increases the force to move an object, but it does not change the direction of the force.
    A movable pulley
  36. A bar that can turn or pivot on a fixed point called the fulcrum.
    lever
  37. A simple machine that you might use to move a heavy box into a truck.
    ramp
  38. A flat slanted surface.
    An inclined plane
  39. How much force you use to move something.
    effort force
  40. Two inclined planes back to back.
    wedge
  41. A machine made up of two or more simple machines.
    compound machine.
  42. Any smooth, shiny object that reflects almost all the light that falls on it.
    mirror
  43. Light waves with a shorter wavelength differ from those with a longer wavelength because they have...
    higher energy
  44. How do you separate white light into the colors it is made up of.
    You pass it through a prism.
  45. A back and forth movement.
    vibration
  46. An area of crowded particles followed by an area of widely spaced particles.
    sound waves.
  47. What are you changing when you tighten or loosen a guitar string.
    The frequency of the sound waves.
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bdoering
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4th Grade science test chap. 12
Updated:
2018-01-08 03:18:24
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Science test chap 12
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Study for 4th grade chapter 12 science test
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