Energy Transfer

Energy Transfer

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Multiple Select

We talked about two specific ways energy is transferred from objects, places, and forms yesterday. What were they?

• Force

• Electricity

• Gravity

• Jumping

Energy transfer is useful.....but never perfect

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Energy can never be created or destroyed

But.....we can lose it

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Energy Loss

It can end up places we don't want.

It can get converted to a form that is not useful to us.​

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When energy is transferred, some energy is usually "lost"

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When energy is transferred, some energy is usually "lost"

​as heat, sound, or light.

Energy Transfer: Light Bulb

​Energy Efficiency of Incandescent and Fluorescent lamps

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"Lost" Light Bulb Energy

Less than 1% of the energy we started with gets turned into light!​

"Lost" Light Bulb Energy

Engineering Connection

Engineers work on solving these problems by trying to make more efficient power plants, light bulbs, and distribution grids.

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Example: LEDs vs. Incandescent​

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chemical --> kinetic

Energy Transfer: Car

Only 17-21% of the energy in gasoline goes to moving the car!

​"Lost" Car Energy

Multiple Choice

Energy transfer is useful and perfect 100% of the time.

• True

• False

Multiple Choice

When energy is "lost" it is completely destroyed.

• True

• False

Multiple Choice

Energy cannot be created or destroyed.

• True

• False

Multiple Choice

When energy is "lost", it just goes places we don't want it to go.

• True

• False

Multiple Choice

Which of these is an example of energy "loss"

• A lightbulb using the energy from the power plant and giving off heat energy.

• A lightbulb using the energy from the power plant and giving off light.

• A car using the energy in gasoline to move from one place to another.

• A swing using the gravitational energy to swing back and forth.

Multiple Select

Energy is usually "lost" as ________, ________, and ________

• heat

• sound

• light

• movement

• energy

Open Ended

Write about something you saw today that would not be possible without energy transfer.

Make sure to include: What was the original source of energy? What was the final use of energy? How was the energy transferred? How was the energy "lost"?