Energy 5.2- Energy Efficiency Flashcards

1
Q

What is energy efficiency?

A

Energy efficiency is a measure of how much input energy is converted into useful output energy.

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2
Q

What is wasted energy?

A

Wasted energy is a measure of how much input energy has been transformed into a form that is not useful.

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3
Q

What is useful energy?

A

The energy that has been transferred into something that contributes to the purpose of the object that requires that energy.

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4
Q

What is renewable energy?

A

Energy sources that are renewable are sources that are unlimited in supply and can be regenerated over and over again.

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5
Q

What are some examples of renewable energy?

A

Wind, Hydroelectric and Solar energy.

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6
Q

What is non-renewable energy?

A

Energy sources that are non-renewable are sources that are limited in supply and cannot be regenerated over and over again.

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7
Q

What are some examples of non-renewable energy?

A

Coal, natural gas, oil, and nuclear energy.

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8
Q

What benefits come from reducing energy consumption?

A

It reduces the amount of greenhouse gases are put into the atmosphere.

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9
Q

What do greenhouse gases do to our atmosphere?

A

It will increase the risk of global warming and climate change.

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10
Q

How do you calculate energy efficiency?

A

Useful output
——————— x 100
Input

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11
Q

What does the energy rating labels do?

A

They tell you the efficiency of the appliance (from a scale from 1-6 or 7-10 if it’s ‘super efficient’) to tell if your house will save energy and running costs.

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12
Q

What are some ways to efficient housing

A

Adding insulation, compact fluorescent globes, eaves over windows for shading, solar panels ect.to save energy.

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