4th Grade science test chap. 12

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bdoering
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225398
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4th Grade science test chap. 12
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2013-06-29 22:18:12
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Science test chap 12
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Study for 4th grade chapter 12 science test
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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. A rock rolling down a hill has ____
    kinetic energy
  11. Sources of heat such as coal, oil, and natural gas.
    fossil fuels
  12. Lenses are tools that _____ light.
    refract
  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. Words such as above and below, left and right, and north and south give clues about _____.
    position
  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, the number of times a sound source vibrates in one second, determines ____.
    pitch
  26. Sound carries ______ because energy is needed to start an object vibrating to make a sound.
    energy
  27. The opposite of an insulator.
    conductor
  28. A range of all light waves with varying wavelengths.
    electromagnetic spectrum
  29. Two important things you can save by using tools are...
    time and energy
  30. The transfer of energy by the flow of liquids and gases.
    convection
  31. The transfer of energy when one particle bumps into another.
    conduction
  32. The distance from the top of one wave to the top of the next wave.
    wave length
  33. An inclined plane twisted around a spiral.
    screw
  34. 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
  35. A bar that can turn or pivot on a fixed point called the fulcrum.
    lever
  36. A simple machine that you might use to move a heavy box into a truck.
    ramp
  37. A flat slanted surface.
    An inclined plane
  38. How much force you use to move something.
    effort force
  39. Two inclined planes back to back.
    wedge
  40. A machine made up of two or more simple machines.
    compound machine.
  41. Any smooth, shiny object that reflects almost all the light that falls on it.
    mirror
  42. Light waves with a shorter wavelength differ from those with a longer wavelength because they have...
    higher energy
  43. White light can be separated into colors that make it up by passing it through a...
    prism
  44. A back and forth movement.
    vibration
  45. An area of crowded particles followed by an area of widely spaced particles.
    sound waves.
  46. If you tighten or loosen guitar strings you are adjusting the pitch of the sound by changing the ....
    frequency of the sound waves.
  47. What simple machines would help to load objects onto a truck if they are too heavy to life.
    A wheel and axle and a ramp.

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