7I — Energy Flashcards

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1
Q

Define joule.

Define Kilojoules.

A

Joule (J): the unit for measuring energy.

Kilojoules (KJ): 1000 joules

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2
Q

What are fossil fuels?

A

— Fossil fuels are coal, oil and natural gas
— They are non renewable
— They are formed over millions of years

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3
Q

What are renewable energy resources?

A

Energy that is being (or can be) replenished as it is used.

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4
Q

How can energy be transferred?

A
— Heating
— Light
— Sound
— Electricity
— Forces
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5
Q

How are fossil fuels formed?

A

Dead organisms do not decompose (due to lack of oxygen) and are compressed. Heat and pressure convert them into fossil fuels.

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6
Q

Name the types of energy stores

A

Kinetic — Movement
Thermal — Heat
Chemical energy
Gravitation Potential Energy

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7
Q

List the advantages and disadvantages of renewable energy

A
Advantages
— Will not run out
— Do not contribute to global warming
Disadvantages
— Are more expensive than fossil fuels
— Are not always available
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