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The ability to do work.
energy
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When light strikes a surface and bounces off.
Reflection
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When a force is used to move an object a certain distance.
work
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The highness or lowness of a sound...
pitch
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The measure of how much useful work a machine puts out compared to the amount of work put into it.
efficiency
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The number of times a sound source vibrates in one second.
frequency
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A material that transfers heat well.
conductor
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The transfer of heat through space.
radiation
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Name 4 simple machines.
Wheel and axle, wedge, pulley, inclined plane, lever
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Give an example of kinetic energy.
A rock rolling down a hill.
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Coal, oil, and natural gas are examples of...
fossil fuels
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A tool that refracts light is a...
lense
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A range of light waves with different wavelengths and energies.
spectrum
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The force that works against motion between surfaces that touch.
friction
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The energy in a sound wave...
amplitude
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Name a few words that tell about position.
above, below, right, left, north, and south
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A material that does not transfer heat very well.
insulator
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The object being lifted or moved by a simple machine.
load
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The bending of light as it passes from one material to another.
refraction
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The distance an object moves in a certain amount of time.
speed
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A push or pull that makes an object start moving, stop moving, speed up, slow down, or change directions.
force
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The tendency of an object to stay at rest or to stay in motion.
inertia
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Energy of motion is also called...
mechanical energy
-
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Frequency determines _____________.
pitch
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What is the number of times a sound source vibrates in one second called?
frequency
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What does sound carry that causes an object to vibrate and make sound.
energy
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The opposite of an insulator.
conductor
-
A range of all light waves with varying wavelengths.
electromagnetic spectrum
-
Two important things you can save by using tools are...
time and energy
-
The transfer of energy by the flow of liquids and gases.
convection
-
The transfer of energy when one particle bumps into another.
conduction
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The distance from the top of one wave to the top of the next wave.
wave length
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An inclined plane twisted around a spiral.
screw
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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
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A bar that can turn or pivot on a fixed point called the fulcrum.
lever
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A simple machine that you might use to move a heavy box into a truck.
ramp
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A flat slanted surface.
An inclined plane
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How much force you use to move something.
effort force
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Two inclined planes back to back.
wedge
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A machine made up of two or more simple machines.
compound machine.
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Any smooth, shiny object that reflects almost all the light that falls on it.
mirror
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Light waves with a shorter wavelength differ from those with a longer wavelength because they have...
higher energy
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How do you separate white light into the colors it is made up of.
You pass it through a prism.
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A back and forth movement.
vibration
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An area of crowded particles followed by an area of widely spaced particles.
sound waves.
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What are you changing when you tighten or loosen a guitar string.
The frequency of the sound waves.
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