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20 Cards in this Set
- Front
- Back
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energy
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the ability to cause change
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natural sources of energy
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wind, sun, and water
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sun
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our main source of energy; gives us light and heat
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potential energy
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the energy an object has because of where it is (position) or its shape
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kinetic energy
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the energy of motion
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electricity
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a form of energy that people make by using other kinds of energy found in nature
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fossil fuels
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fuel formed from dead animals and plants; examples are coal, oil, and natural gas
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batteries
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contain stored energy; allow us to carry around energy
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stored energy
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batteries, fossil fuels, and food
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circuit
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the path electricity follows from a battery through a bulb and back to a battery
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light
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energy that travels as up and down waves
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sound
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energy that travels back and forth; given off by vibrating objects that cause waves
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vibrate
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to move quickly back and forth, producing a sound
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thermal energy
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the energy that moves the particles in matter
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heat
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the movement of thermal energy from one place to another
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thermometer
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a tool used for measuring heat
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thermostat
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controls temperature in a building
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compass
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instrument that contains a magnetic needle that points north
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magnets attract when
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the north and south (opposite)poles are next to each other
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magnets repel when
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like (north and north or south and south) poles are next to each other
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