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GCSE Physics - Energy > Types of Energy > Flashcards

Types of Energy Flashcards

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1
Q

what is the principle conservation of energy?

A

energy cannot be created or destroyed, only changed from one store to another

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2
Q

name the energy stores

A 
Kinetic
Elastic Potential
Gravitational Potential
Magnetic
Internal
Nuclear
Chemical
Electrostatic
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3
Q

what is kinetic energy?

A

energy stored in a moving object

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4
Q

What is elastic potential energy?

A

energy stored in a stretch spring or elastic band

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5
Q

what is gravitational potential energy?

A

energy gained by an object raised above the ground

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6
Q

what is a system?

A

an object or a group of objects that interact together

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7
Q

what is a heat pathway?

A

temperature difference between objects

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8
Q

what are the four energy pathways? (MEHR)

A

Mechanical
Electrical
Heat
Radiation

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9
Q

what is a mechanical pathway?

A

force acts upon an object

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10
Q

what is an electrical pathway?

A

electric current flow

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11
Q

what is a radiation pathway?

A

electromagnetic waves or sound

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12
Q

what is the unit for energy?

A

Joules (J)

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13
Q

what are ways to transfer energy?

A 
light
sound
electricity
thermal
kinetic
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14
Q

what is useful energy?

A

energy transferred and used

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15
Q

what is wasted energy?

A

dissipated energy, stored less usefully

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16
Q

define “dissipate”

A

to scatter in all directions / use wastefully

when energy is wasted, it dissipates into the surroundings and thermal energy

17
Q

what is efficiency?

A

how much energy is usefully transferred

18
Q

what are the ways to reduce “wasted energy” ?

A

insulation - creates a barrier between hot and cold

streamline design - reduces air resistance

lubrication of moving parts - reduces friction

19
Q

define a closed system

A

no change in total energy system

20
Q

define open system

A

energy can dissipate

GCSE Physics - Energy (4 decks)

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