🌞 Part 1: Understanding Radiation

1. In your own words, define radiation heat transfer:

2. How is radiation different from conduction and convection? Circle the correct answer:

Radiation requires direct contact between objects

Radiation can travel through empty space (vacuum)

Radiation only works in liquids and gases

Radiation is the slowest form of heat transfer

3. Give two real-life examples of radiation heat transfer:

Example 1: _________________________________________________

Example 2: _________________________________________________

🔬 Part 2: Investigation Predictions

4. Before conducting the experiment, predict which material will absorb the most heat from the infrared lamp:

Black paper

White paper

Shiny foil

5. Explain your prediction:

6. What do you think will happen to the temperature when we turn on the infrared lamp?

📊 Part 3: Recording Results

7. Record your temperature measurements in the table below:

Material Testing Results

Black Paper - Starting Temperature: ____°C After 5 minutes: ____°C

White Paper - Starting Temperature: ____°C After 5 minutes: ____°C

Shiny Foil - Starting Temperature: ____°C After 5 minutes: ____°C

8. Which material showed the greatest temperature increase?

9. Was your prediction correct? Explain:

🤔 Part 4: Analysis and Understanding

10. Why does black paper absorb more radiation than white paper or shiny foil?

11. Explain why wearing black clothes on a sunny day feels hotter than wearing white clothes:

12. How does heat from the sun reach Earth through the vacuum of space?

Through conduction via air particles

Through convection currents in space

Through electromagnetic radiation waves

Heat cannot travel through space

🌍 Part 5: Real-World Applications

13. Match the radiation heat transfer examples with their explanations:

1. Solar panels

2. Thermal blankets

3. Car dashboard heating up

4. Greenhouse effect

A. Reflects heat radiation away from the body

B. Absorbs solar radiation and converts to electricity

C. Atmosphere traps heat radiation from Earth

D. Dark surfaces absorb radiation through windows

14. Which properties help materials absorb radiation effectively? Check all that apply:

Dark colour

Rough surface

Shiny surface

Light colour

Matte finish

✏️ Part 6: Reflection

15. Draw a diagram showing how radiation heat transfer works from the sun to Earth:

16. What was the most interesting thing you learned about radiation heat transfer today?

17. How might understanding radiation heat transfer be useful in everyday life?

Radiation Heat Transfer Investigation

Radiation Heat Transfer Investigation

🌞 Part 1: Understanding Radiation

🔬 Part 2: Investigation Predictions

📊 Part 3: Recording Results

🤔 Part 4: Analysis and Understanding

🌍 Part 5: Real-World Applications

✏️ Part 6: Reflection

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