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Heat Transfer Investigation

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Heat Transfer Investigation

A group is choosing materials for a reusable lunch container. Use the investigation plan and results below to decide which materials slow heat transfer. Read each question carefully. Temperatures are in degrees Celsius (°C).

Plan and results

The group poured 200 mL of warm water at 60°C into each of four identical cups. They wrapped three cups, each in one material, and left one cup unwrapped as a control. They measured the water temperature after 20 minutes. The cups stood together away from sunlight and draughts. They used the same thermometer each time and waited for the reading to settle.

Cup covering

Final temperature (°C)

No covering (control)

44

Aluminium foil

47

Wool fabric

52

Bubble wrap

50

1.What is thermal energy? Choose the most accurate description.
  • Energy associated with the motion and interactions of particles
  • Energy that exists only in batteries
  • A substance that flows between objects
  • Energy that cannot be transferred
2.Which statement best describes conduction?
  • Thermal energy transfers through direct contact between particles
  • Warm liquid or gas moves from place to place
  • Energy travels as waves through empty space only
  • Coldness flows from one object into another
3.Calculate how many degrees each cup cooled. For example, subtract its final temperature from 60°C. Give the cooling amounts for the control, foil, wool and bubble wrap.
4.Which covering was the best insulator in this test? Use a result from the table as evidence.
5.True or false: thermal energy transferred from the warmer water to the cooler surroundings during the investigation.
TrueFalse
6.Complete the sentence: In a solid material, conduction occurs as particles transfer energy to neighbouring particles by and .
7.The group kept the cup size, water volume, starting temperature and test duration the same. Why is it important to control these variables?
8.Identify the independent variable and the dependent variable in this investigation.
9.The group wants to make their results more reliable. Suggest one improvement to the method.
10.A lunch container needs to keep food warm. Explain why a thick wool lining could help, using the ideas of insulation and particle energy transfer.

3 printable pages

  • Heat Transfer Investigation, page 1 of 3: Plan and results

    Page 1

  • Heat Transfer Investigation, page 2 of 3: 3. Calculate how many degrees each cup cooled. For example, subtract its final…

    Page 2

  • Heat Transfer Investigation, page 3 of 3: 10. A lunch container needs to keep food warm. Explain why a thick wool lining could…

    Page 3

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