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Heat and Colour Experiment

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Heat and Colour Experiment

At a music festival, the science team wants to know whether black or white surfaces warm more in sunlight. Read the investigation and results, then use evidence to explain what happened. Never look directly at the Sun.

The investigation

Amira and Arjun wrapped two identical cans in black and white paper. They poured the same amount of water at the same starting temperature into each can. The cans sat side by side in direct sunlight for 12 minutes. They measured the water temperature every 3 minutes. Their results are below. The black and white paper colours were the only planned difference.

Time (minutes)

0

3

6

9

12

Black paper

20

24

28

31

34

White paper

20

22

24

25

26

Investigate the evidence

Answer using the results above. Temperature is measured in degrees Celsius (°C).

1.Which factor did Amira and Arjun change on purpose: the paper colour, the amount of water, or the time in sunlight?
  • The paper colour
  • The amount of water
  • The time in sunlight
2.Name one factor they kept the same to make this a fair comparison.
3.How much did the black-paper can warm from 0 to 12 minutes? Show the subtraction.
4.How much did the white-paper can warm from 0 to 12 minutes? Show the subtraction.
5.At 9 minutes, what was the temperature difference between the cans? Which can was warmer?
6.Choose the best conclusion supported by these results.
  • The black-paper can warmed more than the white-paper can in this test.
  • The white-paper can warmed more than the black-paper can.
  • Both cans stayed at 20°C.
7.Explain how absorption and reflection help explain the difference. Use both words.
8.The black can warmed by 14°C and the white can by 6°C. How many more degrees did the black can warm?
9.True or false: These results prove that every black object will always be hotter than every white object.
TrueFalse
10.Suggest one improvement or extra test that would make the investigation more reliable.
11.At a sunny outdoor festival, which colour might be more comfortable for a shade tent, and why?

3 printable pages

  • Heat and Colour Experiment, page 1 of 3: The investigation, Investigate the evidence

    Page 1

  • Heat and Colour Experiment, page 2 of 3: 3. How much did the black-paper can warm from 0 to 12 minutes? Show the subtraction.

    Page 2

  • Heat and Colour Experiment, page 3 of 3: 11. At a sunny outdoor festival, which colour might be more comfortable for a shade tent,…

    Page 3

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