Preview question: Based on the introduction, what do you think this video is going to be about?

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NGSS.HS-ESS1-2

Youngshang Han, one of the engineers featured in the video, was inspired to make wearable electronics because of this movie.

What is the primary purpose of the wearable electronic devices discussed in the video?

• To keep the user warm

• To generate electricity from body heat

• To monitor health without energy use

• To replace batteries in devices

Han and Malakooti's new device is an example of...

• energy transfer

• energy creation

• energy transformation

• energy destruction

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NGSS.HS-PS3-3

Based on the 2nd Law of Thermodynamics, why does the device feel cold on a person's skin? (HINT: Heat from ______ is transferred to _____ so _________________).

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NGSS.HS-PS3-4

Which scientific law is connected to the idea that energy can be transferred or transformed but not created or destroyed?

• Law of Conservation of Mass

• 2nd Law of Thermodynamics

• 1st Law of Energy

• 1st Law of Thermodynamics

What is the MOST IMPORTANT REASON for Han and Malakooti's device to be flexible and stretchy?

• To make it less expensive to produce.

• So that it will not be uncomfortable for a person to wear in their clothes.

• So that it can stretch over a person or object while they are wearing it and still produce electricity.

• To make it stronger.

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NGSS.MS-ETS1-1

The particles in liquid metal are

• flowing and randomly arranged

• locked in place and vibrating

• locked in place and randomly arranged

• flying and randomly arranged

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NGSS.MS-PS1-4

What were some possibilities you heard in this video of how this new device could be used in the future?

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NGSS.HS-ESS3-4

NGSS.HS-ETS1-3

NGSS.HS-PS3-3

If energy cannot be created or destroyed (1st Law of Thermodynamics), what do you think the presenter means when they talk about "waste heat"?

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NGSS.HS-PS3-4