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Grade 7 · Science · Unit 9 of 10

Moving Heat

Conduction, convection, radiation

What your child practises

How heat is transmitted by conduction, convection and radiation, how the Sun's radiation heats different surfaces, and technologies such as insulation and double-pane windows that reduce heat loss.

Nunavut Curriculum approved guide: Nunavut adaptation of Alberta Science 7–9 (2003), Unit C: Heat and Temperature · conduction, convection, radiation and controlling heat transfer

Sample questions

A taste of this unit. In the app, questions change every time and get easier or harder to match your child.

  1. Question 1

    Which is an example of heat transfer by conduction?

    • The Sun warming Earth
    • Warm air rising from a heater
    • A pan handle becoming hot on a stove
    • Smoke rising in a chimney

  2. Question 2

    Which action would NOT reduce heat loss from a house in winter?

    • installing double-pane windows
    • adding attic insulation
    • opening windows to let in fresh air for hours
    • sealing gaps around doors

  3. Question 3

    A thermos keeps drinks hot using a vacuum gap between two shiny walls. What does the vacuum do?

    • It makes the walls thicker
    • It adds heat to the drink
    • It stops conduction and convection across the gap
    • It stops radiation completely by itself

  4. Question 4

    Which kind of heat transfer makes you feel warm when you stand near a campfire without touching it?

    • radiation
    • evaporation
    • convection only
    • conduction

  5. Question 5

    Conduction, convection or radiation? Sort each example.

    Sort into: 🥄 conduction · 🌬️ convection · ☀️ radiation

    • ☀️warmth from the Sun on your face
    • 🥄a metal spoon warming in hot soup
    • 🍲water circulating in a boiling pot
    • 🏖️bare feet heated by hot sand
    • 🔥warmth from a campfire felt at a distance
    • ♨️warm air rising from a radiator

  6. Question 6

    During the day near a big lake, the land warms faster than the water. What happens to the air over the land?

    • It warms and rises, and cooler air from the lake moves in
    • It cools and sinks
    • It changes into water
    • It stops moving

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