Energy

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  • Created by: Eve Angus
  • Created on: 30-12-18 17:06
Kinetic Energy Store
Any object that is moving
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Thermal Energy Store
The hotter something is the more energy it has in it's store
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Chemical Energy Store
Anything that can release energy by a chemical reaction
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Gravitational Potential Energy Store
Anything with a mass that is inside a gravitational field
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Elastic Potential Energy Store
Anything that is stretched or compressed
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Electrostatic Energy Store
Anything with an electrical charge that is interacting with another magnet
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Magnetic Energy Store
Anything magnetic that is interacting with another magnet
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Nuclear Energy Store
Atomic nuclei have energy stored that can be released in nuclear reactions
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Closed System
A system where neither matter nor energy can enter or leave
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Mechanical Transfer
An object moving due to a force acting on it
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Electrical Transfer
A charge or current moving through a potential difference
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Heat Transfer
Energy transferred from a hotter object to a colder object
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Radiation Transfer
Energy transferred by waves
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Work Done
The energy transferred when a force moves an object through a distance or by a moving charge and is measured in joules
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Conservation of Energy Principle
Energy can be transferred usefully, stored or dissipated but can never be created or distroyed
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Specific Heat Capacity
The amount of energy needed to raise the temperature of one kilogram by one degrees celsius
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Required Practical - Specific Heat Capacity
You can investigate the specific heat capacity of a solid material by measuring the temperature change of a thermometer and the energy transferred by the heater
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Power
The rate of energy transfer or the rate of doing work and is measured in watts
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Conduction
The process by which vibrating particles transfer energy to neighbouring particles
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Thermal Conductor
A material with a high thermal conductivity
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Convection
Where energetic particles move from hotter to cooler regions
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Thermal Insulation
A material with a low thermal conductivity
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Cavity Walls
Made up of an inner and outer wall with an air gap in the middle to reduce the amount of energy transferred by conduction through the walls
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Loft Insulation
Fibreglass is made of thin strands of glass and is laid across the loft floor to reduce the conduction to the attic space
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Double Glazing
Double-glazed windows have an air gap between two sheets of glass to prevent energy transfer by conduction through the windows
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Draught-proofing
Draught excluders or strips of foam or plastic around doors or windows stop draughts from blowing in and out reducing energy transfer by convection
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Thick Curtains
Big bits of cloth over the window create an air gap between the room and the window stopping hot air reaching the glass by convection
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Hot Water Tank Jacket
Putting fibreglass wool around a hot water tank reduces the energy transferred by conduction from the tank's thermal energy store
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Required Practical - Reducing Energy Transfers
You can investigate how effective various materials are as thermal insulators by measuring the temperature differences of water after covering it with different insulating materials
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Lubricant
They are usually liquids that flow easily between the objects to reduce the friction
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Efficiency
How much useful energy/power output is transferred out of the total energy/power input
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Improving Efficiency
Because no device is 100% effective you can improve efficiency of energy transfers by insulating objects, lubricating them or making them more streamlined
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Non-renewable Energy Resources
Resources that damage the environment and that aren't being made at the same rate as they are being used and will therefore run out
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Renewable Energy Resources
Resources that aren't seriously harmful to the environment and that are being made at the same rate as they are being used
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Wind Power
Wind is used in places like moors and coasts to turn wind turbines to generate electricity
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Solar Power
Solar cells generate electric currents directly from the sun's radiation
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Geothermal Power
Steam and hot water of hot underground rocks are used to drive a turbine and generate electricity
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Hydroelectric Power
Water is allowed out of a big dam at a controlled rate through turbines after the flooring of a valley
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Wave Power
As waves come into the shore they provide an up and down motion which can be used to drive a generator and generate electricity
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Tidal Power
As a tide comes in it fills the estuary and is held by a barrage and released at a controlled speed when it is needed
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Bio Fuels
Renewable energy resources that are created from pant products or animal dung and are burnt to produce electricity
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Fossil Fuels
Non-renewable energy resources that are burnt to produce electricity
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Nuclear Fuels
Nuclear fission of uranium and plutonium releases energy to heat water into steam which drives a turbine to generate electricity
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Other cards in this set

Card 2

Front

The hotter something is the more energy it has in it's store

Back

Thermal Energy Store

Card 3

Front

Anything that can release energy by a chemical reaction

Back

Preview of the back of card 3

Card 4

Front

Anything with a mass that is inside a gravitational field

Back

Preview of the back of card 4

Card 5

Front

Anything that is stretched or compressed

Back

Preview of the back of card 5
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