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Science 8c And 8K > 8k > Flashcards

8k Flashcards

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1
Q

What does the amount of thermal energy stored depend on

A

The material
Temperature
Its mass

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2
Q

What is power

A

The rate at which energy is transferred

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3
Q

What is power measured in

A

Watts

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4
Q

What is energy measured in

A

In joules

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5
Q

How to calculate efficiency

A

Effiency = useful energy transferred
————————- X 100
Total energy supplied

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6
Q

How to calculate paying for energy

A

Payback time = cost of change
—————
Savings per year

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7
Q

Thermal energy meaning

A

Another term for heat energy

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8
Q

Conduction

A

The way energy is transferred through solids by heating

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9
Q

Convection

A

The way energy is transferred by heating in fluids

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10
Q

Emit meaning

A

To give out

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11
Q

Radiation

A

A way of transferring energy by heating

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12
Q

Payback time meaning

A

The time it takes to get back the money you spent on making an energy saving change

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13
Q

Fossil fuels

A

A fuel fomed fromcdead remains of organisms over millions of years

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14
Q

3 types of fossil fuels

A

Coal
Oil
Gas

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15
Q

Ways to extract fossil fuels

A

Drilling

Mining

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16
Q

What is potential energy

A

Something that could potentialy be used as work

17
Q

What is Work

A

the transfer of energy by a force acting on an object

18
Q

What is glucose

A

Cells use oxygen to release energy stored in glucose

19
Q

4 types of energy

A

Kinectic energy
Heat energy
Sound energy
Gravitational energy

Science 8c And 8K (2 decks)

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