Science Quiz - Energy Types 01 (Answers)
What do you know about energy types? Find out in this KS3 Science quiz. Physicist Hermann von Helmholtz established that all forms of energy are equivalent - energy in one form can disappear but the same amount of energy will appear in another form. As one type of energy is transferred into another, it is often possible to make things happen.
An example of this is a hydroelectric power station. Water in a reservoir high in the mountains has more gravitational potential energy than when it is lower down. As it flows downhill, the gravitational potential energy is transformed into kinetic energy. The kinetic energy can be used to turn a turbine connected to a generator. This changes the kinetic energy into electrical energy which is really useful.
Some energy forms can be stored but others can't.
Electrical energy can be stored for a short while in a device called a capacitor but if it is changed into chemical energy in a accumulator (rechargeable battery), it can be stored for longer periods of time. Potential energy is a good way of storing energy too - there is gravitational potential energy (the energy of where an object is) and elastic potential energy (the energy contained in an object that has been twisted or bent without breaking it).
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You can find more about this topic by visiting BBC Bitesize - Energy
If two objects have the same mass, the one that is moving faster will have more kinetic energy
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If you move an object from one shelf to a higher shelf, it will have more potential energy due to gravity
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Also called elastic potential energy
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Hope you weren't tempted by electrical!
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This is often achieved by making an object very hot but not always - a glow worm uses a chemical reaction to produce light
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Thermal and heat energy are the same
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Can you imagine life without electrical energy?
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It was named after physicist J.P. Joule (1818-1889)
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It moves!
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A change in temperature of an object tells you if it is gaining or losing thermal energy
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