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17 Cards in this Set
- Front
- Back
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What is an example of an energy transformation?
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a microwave changes electric energy into radiant energy. Radiant energy changes into thermal energy to pop popcorn kernels
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what is an example of a change between kinetic and potential energy ?
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throwing a ball into the air
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when does a ball have the most kinetic energy when someone throws it?
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has the most kinetic energy immediately after leaving the person's hand
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what decreases as a thrown ball's height increases?
what increases? |
speed and kinetic energy decrease
potential energy increases |
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At the highest point in the air, what does the ball have the highest amount of?
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has the highest amount of potential energy
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as the ball drops back towards Earth what decreases? why?
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potential energy
because the height of the ball decreases |
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as a ball falls back to Earth what does the balls potential energy turn into?
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kinetic energy
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What is the law of conservation of energy
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energy can be transformed from one form into another or transferred from one region to another, but energy cannot be created or destroyed
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What is friction
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a force that resists the sliding of two surfaces that are touching
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Give an example of how friction effects the transformation of energy
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mechanical energy of bike is transformed into thermal energy due to friction when the brakes are applied
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what is always transformed due to friction? what is it transformed into?
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the energy that 2 objects that are touching give off
into thermal friction |
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what are two examples of transforming energy into thermal energy?
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Gas stove transforms chemical energy into thermal energy that cooks food
Electric space heater transforms electric energy into thermal energy |
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2 examples of transforming energy from or into chemciak energy
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Plant transfers suns radiant energy
into chemical energy body transfers chemcisk energy from food into kinetic energy for movement |
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2 examples of transforming energy into radiant energy
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when you LISTEN to someone on your cell phone the cellphone transforms radiant energy into electrical and then into sound energy
when you SPEAK into your cell phone it transforms sound energy into electric and then into radiant energy |
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2 examples of objects that use electric energy
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hair dryers and other electric appliances uses electric energy
handheld video games and other battery operated things transform chemical energy from batteries into electric energy |
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During energy transformations some energy is always transformed into what?
what do we call this? |
thermal energy
waste energy |
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example of waste energy
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lightbulb tramsforms electrical energy into radiant energy however, some energy gets transformed into thermal energy(waste energy)
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