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Biblioteka

Gizmos: Heat Absorbtion

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Posljednje ažuriranje about 4 years ago
38

Link to this Gizmo

https://gizmos.explorelearning.com/index.cfm?method=cResource.dspView&ResourceID=655

Prior Knowledge/Warm Up
1
1
Activity A
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1
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1
Activity B
3
1
Activity C
2
1
Extra Credit
5

Shine a powerful flashlight on a variety of materials, and measure how quickly each material heats up. See how the light angle, light color, type of material, and material color affect heating. A glass cover can be added to simulate a greenhouse.

Link to this Gizmo

https://gizmos.explorelearning.com/index.cfm?method=cResource.dspView&ResourceID=655

Pitanje 1
1.

Click on the correct answer

Pitanje 2
2.

Click on the correct answer

Gizmo Warm-up

In the Heat Absorption Gizmo, a powerful flashlight can shine on a variety of materials.

Make sure that the Light color is set to White.

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Pitanje 3
3.

Drag the Wood under the beam of light. What do you notice?

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Pitanje 4
4.

What is the color of the light that is reflected off the wooden block?

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Pitanje 5
5.

Energy that is transmitted through space by light waves is called radiation.

The wood gets hotter because it gains thermal energy from the light waves.

Activity A

Angle of Light

Getting the Gizmo Ready

- Click Reset

- Check that the light color is set to White

- If necessary, drag the wood under the light

Pitanje 6
6.

Observe:

Drag the flashlight to several different angles. When is the light beam most concentrated on the piece of wood?

Pitanje 7
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Pitanje 8
8.

Experiment: For each angle listed below, record the final temperature of the wood after 3 hours of heating with the flashlight.

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Pitanje 9
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Pitanje 10
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Pitanje 11
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Pitanje 12
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Pitanje 13
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Pitanje 14
14.

Draw conclusions:

Why did increasing the angle of the beam of light cause the wood to heat up more?

Pitanje 15
15.

Apply: St. Louis, Missouri, is located near the middle of the United States.

On June 21, the noon Sun rays hit St. Louis at an angle of 75°.

On December 21, the noon Sun rays hit at an angle of 28°.

How will this affect the temperature in St. Louis on these dates?

Activity B

Colored Materials

Getting the Gizmo Ready

- Click reset

- Drag the Flashlight so that the light angle is 75o

Pitanje 16
16.

Observe:

Drag the red brick under the flashlight beam. Try three different Light colors: red, blue, and green.

  • Red

  • Blue

  • Green

  • What color(s) reflect off a red brick?

  • What colors of light are absorbed by the brick?

Collect data: Heat the red, green, and blue bricks under each color of light. Record results.

Have the light at a 75o angle

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Pitanje 17
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Pitanje 18
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Pitanje 19
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Pitanje 20
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Pitanje 21
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Pitanje 22
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Pitanje 23
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Extend your thinking:

White light is a combination of red, green, and blue light.

Why is it cooler to wear a white shirt on a sunny day than a black shirt?

Activity C

Comparing Materials

Getting the Gizmo Ready

- Click reset

- Change the light color to white

Pitanje 24
24.

Experiment:

Using white light, heat up each of the following substances for 3 hours

Set angle to 75o

No Glass

For the change in temperature take

Final Temperature - Initial Temperature

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Pitanje 25
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Pitanje 26
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Pitanje 27
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Pitanje 28
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Pitanje 29
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1
Pitanje 30
30.

Based on the results, which 2 substances do you think reflected the most light?

Experiment:

Using white light, heat up each of the following substances for 3 hours

Set angle to 75o

Click on Add glass cover

For the change in temperature take

Final Temperature - Initial Temperature

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Pitanje 31
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Pitanje 32
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Pitanje 33
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Pitanje 34
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Pitanje 35
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Pitanje 36
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Pitanje 37
37.

Extend your thinking: Why is it dangerous to leave an infant or pet in a car on a sunny day with the windows rolled up?

Pitanje 38
38.

Answer the 5 questions below the gizmo. Take a screenshot of your score and paste it below.