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Experiment
Which Colors Are Hot?

Which Are Not?


 

Problem: Do different colors make a surface heat up faster?

Research: Look up information about temperature, heat, and color.

Hypothesis: Predict which color will cause the surface to heat up faster.
I think that the ___________________ colored surface will heat up faster.

Setting Up the Experiment:

Materials:

Procedure:
Manipulated Variable: Color of each surface (This is the only thing you can change.)
Responding Variable: The temperature of the surfaces taken every 10 minutes. (these are the results that you will measure and record.)

Steps:

  1. Prepare the surfaces:
  2. Place the thermometer on top of each of the bricks and recording the starting temperature. They should all be the same, around 70- 72F or 22- 23 C, which is room temperature.
  3. Set up the lamp on a table or desk and turn it on. Place one or two of the bricks directly under the beam of light. You may need to adjust the goose-neck so that the light falls directly onto the bricks. Depending on the size of your lamp and the size of the bricks, you may be able to do two bricks at a time or you may have to test them one at a time.
  4. Measure and record the temperature of the surface of the bricks every ten minutes. Move the goose-neck away while you use the thermometer to quickly measure the temperature of each brick. Then put the lamp back into position. Do not leave the thermometer on the surface of the bricks.
  5. Complete the test for each of the colored bricks, measuring and recording the temperature every ten minutes for a total of 60 minutes.
  6. Repeat steps 2 - 5 for the metal pie plates. (You may need to do this on another day.) Record all of your measurements.
  7. If time allows, you should do another trial for the bricks and another trial for the metal pie plates. This will make sure that you have enough data and that your results are valid. Record all of your measurements.
 

Results:
Make charts like these to record your results. Then you can graph the temperature changes over time on line graphs.
 

Temperature Changes on the Brick Surface

Time
Unpainted White Black Red Blue
Orange
Yellow
Green
Start- 0 minutes                
10 minutes                
20 minutes                
30 minutes                
40 minutes                
50 minutes                
60 minutes                

 

Temperature Changes on the Metal Pie Plate Surface

Time

Unpainted White Black Red Blue

Orange

Yellow

Green

Start- 0 minutes                
10 minutes                
20 minutes                
30 minutes                
40 minutes                
50 minutes                
60 minutes                

Sample Line Graph:

Conclusion:
Look over your results. What did you find out? Does the color of the surface make a difference? Which color caused the brick to heat up fastest? Which color caused the metal pie plate to heat up faster? Which colors stayed the coolest? How can this information be useful?

Write your conclusion and answer the problem. Tell if your hypothesis was correct or incorrect.