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Science 2 > Energy > Flashcards

Energy Flashcards

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1
Q

The Law of Conservation of Energy is…

A

Energy can NEVER be created or destroyed, only transferred between stores.

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2
Q

How many stores of energy are there?

A

8

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3
Q

What are all the energy stores?

A 
Electrical            
Chemical
Kenetic
Nuclear 
Thermal
Elastic
Gravitational
Magnetic
A way you can remember it is Every Cat Knows Not To Eat Grey Mice
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4
Q

What affects the amount of kinetic energy an object has?

A

The mass of the object

How fast it is moving

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5
Q

Chemical stores of energy include:

A

FUELS like methane, coal, petrol, wood etc
FOOD like rice, potatoes, sugars, & fats
BATTERIES

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6
Q

Energy is measured in…

A

Joules, (J).

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7
Q

How many J are in a KJ?

A

There are 1000J in a kJ.

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8
Q

Temperature:

A

The AVERAGE kinetic energy of all the particles in an object.

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9
Q

Thermal store of energy:

A

the TOTAL amount of kinetic energy of all the particles in an object added together.

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10
Q

What are elastic objects?

A

Objects that can be DEFORMED, STRETCHED or COMPRESSED and then return to there original form.

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11
Q

When does an object gain energy in its Elastic store

A

When it is DEFORMED, STRETCHED or COMPRESSED

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12
Q

What is gravitational energy?

A

ENERGY stored in something that has been LIFTED in a gravitational field.

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13
Q

What affects the amount of Gravitational energy an object has?

A

The mass of the object
How high it has been lifted.
How strong the gravitational field is of the planet you are on.

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14
Q

What has electrostatic store of energy?

A

Objects with charged particals.

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15
Q

A positive charged particle and a Positive charged particle…

A

Repel

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16
Q

A negative and a negative charged particle

A

Repel

17
Q

A negative and a Positive charged particle.

A

Attract

18
Q

What is nuclear energy?

A

Energy stored inside the nucleus of an atom.

19
Q

what is Fission?

A

To split the nucleus of an atom.

Eg. power plants

20
Q

What is Fusion?

A

To combine two nuclei together.

Eg. the Sun

21
Q

magnetic field

A

magnetic field is an area around a magnet.

22
Q

name the Magnetic materials:

A

iron, nickel, cobalt and steel

23
Q

mechanical transfer

A

This is the energy transferred when a force moves an object over a distance.

24
Q

ELECTRICAL TRANSFER

A

This is the energy transferred by a moving charge through a complete circuit

25
Q

What is an Energy transfer

A

the process by which energy is moved from one store to another

26
Q

Name the 4 energy transfers

A 
Radiation
Heat
Electrical
mechanical
You can Remeber this by Rats Hate Every Mouse.
27
Q

RADIATION TRANSFER

A

Radiation is the transfer of energy in the form of WAVES.

They usually spread out from a SOURCE.

28
Q

Name as many waves as you can

A 
Light waves
Sound waves
Water waves
Radio waves
Microwaves
Infrared waves
Ultraviolet waves
X-Rays
Gama rays
29
Q

HEAT TRANSFER

A

Anything with a THERMAL STORE of energy will gradually lose this store if the surroundings are colder:

30
Q

CONDUCTION

A

CONDUCTION happens mainly in SOLIDS. Hot particles bump into their neighbours, passing along some of their THERMAL STORE.

31
Q

CONVECTION

A

CONVECTION happens in FLUIDS (Liquids and Gases). Hot fluids rise upwards and cold fluids fall downwards.

32
Q

INFRARED RADIATION

A

INFRARED RADIATION is a special case of a RADIATION transfer. Infrared waves are felt as HEAT, and anything with a temperature automatically gives out infrared waves.

33
Q

WHAT IS AN ENERGY FLOW DIAGRAM?

A

transfers can be represented using an energy flow diagram

34
Q

In a flow diagram Boxes represent…

A

stores of energy

35
Q

In a flow diagram Arrows represent…

A

energy transfers

Science 2 (2 decks)

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