Year 7 Science · Unit 3 · Lesson 14

Heat Energy and Temperature

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Learning Goals

Warm Up

Compare the three methods of heat transfer

Complete the table to compare conduction, convection, and radiation across each feature. Use the lesson to fill in all cells.

FeatureConductionConvectionRadiation
Requires a medium (matter)?
Works in a vacuum?
Which particles move?
Best in which state of matter?
One Australian example

Your Turn

Because… chain

A bushfire is approaching a house on the Nullarbor Plain. Fill in the missing effects. Each cause leads to the next step in the chain.

A bushfire burns intensely 300 m from a house
→
Infrared radiation travels through the air without needing a medium
→
The exterior timber wall absorbs the radiation and heats up
→
Thermal energy conducts through the wall from particle to particle
→
Hot air inside the house begins to rise; cooler air near the floor sinks
→

Overall outcome:

Show What You Know

1. A thermos flask keeps drinks hot for many hours. Explain how the thermos reduces ALL THREE methods of heat transfer. Name each method and the specific design feature that reduces it.

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2. On a hot summer day in Alice Springs (regularly above 40°C), why would a white car stay cooler inside than a black car parked in the same location? Which method of heat transfer explains this?

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Wrap Up

In one sentence, what was the main idea of this lesson?

HSCScience · Year 7 Science · Unit 3 · Lesson 14 · Apply Worksheet