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27 Cards in this Set
- Front
- Back
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what object shows light energy?
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a clock or flashlight?
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what are fuels?
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things that are burned to give heat are fuels.
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name an object that changes one form of energy into another.
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a toaster or television
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is heat another form of energy?
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yes, heat is used to change matter.
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does a television use electricity?
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yes, a television uses electricity and changes electricity into light and sound.
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can anything move faster than light.
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no, nothing can move faster than light.
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what are four forms of energy?
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light, sound heat , and electricity are the four forms of energy.
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a radio changes electricity into what other form of energy?
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a radio changes electricity into sound
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Why can you see through some things and not others?
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you can see through some things when light passes through them.
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name four kinds of fuels?
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oil, gas. wood, and coal are fuels.
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what can heat be used for?
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it warms homes. it is used to cook. it is used to dry clothes.
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why can you see yourself in a mirror?
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you can see yourself in a mirror because a mirror reflects almost all light that hits it.
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can energy be changed from one form to another?
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yes, an example of energy changing form is electricity changing to heat. like when you toast bread.
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what is friction?
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friction is when two things are rubbed together to make heat,.
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electricity can come from plugs or batteries.
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yes
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what is energy needed for?
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energy is needed to change things.
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what can heat be used for?
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it warms homes. it is used to cook. it is used to dry clothes.
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what form of energy can you hear?
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sound is the form of energy that you can hear.
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what does reflected mean?
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reflected means that light hits something and then bounces off of it.
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do all things reflect the same?
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no, some things reflect bettyer than other things.
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what form of energy can you hear?
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sound
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what does absorbed mean?
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things are not reflected they trap light instead.
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what is electricity?
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electricity is a form of energy usedfor light, heat, and to run machines.
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name three forms of energy.
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1. light
2. sound. 3.heat |
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what kind of lines does light move in? straight or zigzag?
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light moves in straight lines.
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what form of energy can you see?
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light
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are there many forms of energy?
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yes
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