Answer Key Heat Absorption Gizmo

Answer Key Heat Absorption Gizmo

The Heat Absorption Gizmo is an online simulation that allows students to explore how different materials and colors absorb and reflect light, and how this affects their temperature. The Gizmo can be used to teach concepts such as radiation, thermal energy, greenhouse effect, and color theory. In this article, we will provide the answer key for the Student Exploration Sheet that accompanies the Gizmo.

Prior Knowledge Questions

Before using the Gizmo, students are asked to answer two questions based on their prior knowledge. Here are the questions and the correct answers:

answer key heat absorption gizmo

• Is it usually hotter outside when the Sun is low in the sky, such as early in the morning, or when the Sun is high in the sky, around noon?Answer: It is usually hotter outside when the Sun is high in the sky, around noon. This is because sunlight is more direct and concentrated at noon.

• If you want to stay cool on a hot, sunny day, should you wear black or white? Why?Answer: You should wear white on a hot, sunny day. This is because white materials reflect more light than black materials. The more light that is reflected, the less heat that is absorbed.

Gizmo Warm-up

In the Gizmo Warm-up, students are asked to observe how a piece of wood reacts to a powerful flashlight. Here are the questions and the correct answers:

• Drag the Wood under the beam of light. What do you notice?Answer: Some of the light is reflected off the wood. The wood also gets warmer over time.

• What is the color of the light that is reflected off the wooden block?Answer: The color of the light that is reflected off the wooden block is red-brown, which is similar to the color of the wood itself.

• Click Play ( ) to start the clock.A. What happens to the temperature of the wood?B. The light that is not reflected away is absorbed by the wood. What does the absorbed light energy do to the wood?Answer:A. The temperature of the wood increases as time passes.B. The absorbed light energy increases the thermal energy of the wood. Thermal energy is related to how fast the molecules in a material are moving. The faster they move, the hotter they are.

Question: How does the angle of light affect heating?

In this section, students are asked to investigate how changing the angle of the flashlight affects how much heat is transferred to the wood. Here are the questions and the correct answers:

• Drag the flashlight to several different angles. When is the light beam most concentrated on the piece of wood?Answer: The light beam is most concentrated on the piece of wood when the angle is 90, meaning that the flashlight is directly over the wood.

• Form hypothesis: How will the angle of light affect how much the piece of wood is heated?Answer: A possible hypothesis is: The smaller the angle of light, the less the piece of wood is heated. This is because the light beam becomes more spread out and less intense as the angle decreases.

• Predict: Which angle will result in the hottest piece of wood?Answer: Based on the hypothesis, the angle that will result in the hottest piece of wood is 90.

Experiment: For each angle listed below, record the final temperature of the wood after 3 hours of heating with the flashlight.Answer:The final temperatures may vary slightly depending on the simulation settings, but here are some possible values:

• Angle Final Temperature ----- ----------------- 20 30C 40 35C 60 40C 80 45C 90 50C

Question: How does the color of light affect heating?

In this section, students are asked to explore how different colors of light affect the heating of different colored bricks. Here are the questions and the correct answers:

Collect data: Heat the red, green, and blue bricks under each color of light. Record results.Answer:The final temperatures may vary slightly depending on the simulation settings, but here are some possible values:

• Light Color Red Brick Green Brick Blue Brick ----------- --------- ----------- ---------- Red 20C 25C 25C Green 27C 20C 26C Blue 26C 27C 20C

• Analyze: Based on your data, what light colors were absorbed and reflected by each brick?Answer:Red brick: It reflected red light, and absorbed green and blue light.Green brick: It reflected green light, and absorbed red and blue light.Blue brick: It reflected blue light, and absorbed red and green light.

• 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?Answer: A white shirt will reflect all the colors contained in white light. It wont heat up very much because most of the energy is reflected away. A black shirt will absorb all the colors contained in white light. It will heat up a lot because most of the energy is converted into thermal energy.

Conclusion

The Heat Absorption Gizmo is a useful tool for learning about how light and heat interact with different materials and colors. By using the Gizmo, students can discover the following key concepts:

• Objects heat up when they absorb light.

• The angle of light affects how much heat is transferred to an object.

• An object has a certain color because it reflects light of that color.

• The color of light affects how much heat is transferred to an object.

• A glass cover can trap heat inside an enclosed space, creating a greenhouse effect.

We hope that this article has helped you to understand the answers for the Student Exploration Sheet. If you want to learn more about the Heat Absorption Gizmo, you can visit its official website. You can also find more Gizmos related to science topics on ExploreLearning. Happy learning!