Energy

DOES NOT CONTAIN FORMULAE

(COMBINED SCIENCE ONLY)

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What does the Law of Conservation of Energy state?
Energy cannot be created or destroyed, but can be stored, transferred or dissipated to the environment
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What does the Input Energy equal?
the output energy
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What does dissipated mean?
spread out to the environment
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What is Kinetic Energy?
Anything that is moving.
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What is Thermal Energy?
Anything that contains heat.
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What is Chemical Energy?
Energy released by a chemical reaction
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What is Gravitational Potential Energy?
Anything that can fall
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What is Elastic Potential?
Anything that can stretch
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What is Electrostatic (Electrical) energy?
two charges that attract / repel each other
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What is Magnetic Energy?
Magnets that attract or repel each other
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What is Nuclear Energy?
atomic nuclei release energy from their store.
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How is energy transferred MECHANICALLY?
A force acting on the object e.g pushing, stretching, squashing
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How is energy transferred by HEATING?
energy is transferred from the hotter to the colder object
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How is energy transferred ELECTRICALLY?
a charge doing work against resistance
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How is energy transferred through RADIATION?
Energy transferred through waves
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Define a closed system.
a system that can be completely isolated, and does not exchange energy with it's surroundings
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Define an open system.
a system that cannot be completely isolated and does exchange energy with it's surroundings
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What is useful energy?
energy that is being transferred to a useful energy store
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List the three factors that affect the rate of energy transfer.
-thickness of material -thermal conductivity -temperature difference across it
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Convection
Part of a fluid that is warmer than the rest rises and sets up a convection current. Warm air rises at it become less dense, it transfers it's energy then cools and sinks.
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radiation
only way energy is transferred through a VACUUM. Transferred as waves. Passes through gas and some solid materials
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conduction
vibrations are passed through particles in a solid as they collide as the material gets hotter. Needs to be direct contact. Metal is a good conductor.
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What objects absorb radiation best?
black/ dark materials
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What reflect radiation best?
shiny objects
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What is a vacuum?
Has no particles.
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Other cards in this set

Card 2

Front

the output energy

Back

What does the Input Energy equal?

Card 3

Front

spread out to the environment

Back

Preview of the back of card 3

Card 4

Front

Anything that is moving.

Back

Preview of the back of card 4

Card 5

Front

Anything that contains heat.

Back

Preview of the back of card 5
View more cards

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DOES NOT CONTAIN FORMULAE, if I have missed any subtopics of energy, let me know!

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