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Grade 8 · Science · Unit 7 of 8

Evidence of Climate Change

Spot the clues that show Earth is warming.

What your child practises

Practises telling weather from climate, the greenhouse effect, kinetic molecular theory and thermal expansion, and the evidence for climate change, including the Mi’kmaw view that long-term observation counts. Ties to the Nova Scotia Grade 8 science outcomes on Climate Change.

Nova Scotia Curriculum learning outcome: Climate Change · Explain evidence for climate change, using records, particles and ocean observations

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

    Satellites help scientists by…

    • planting trees
    • measuring sea ice and temperatures from space
    • making rain

  2. Question 2

    Kinetic molecular theory says that when water is heated, its particles…

    • stop moving until it cools
    • move more slowly and pack closer
    • move faster and spread slightly farther apart

  3. Question 3

    Which of these is a greenhouse gas?

    • argon
    • carbon dioxide
    • nitrogen

  4. Question 4

    Why is the ocean such an important store of heat?

    • Water reflects all heat back into space
    • Oceans make their own heat from salt
    • Water can take in a lot of heat energy

  5. Question 5

    Thermometer records over more than a century show Earth's average surface temperature has…

    • fallen steadily
    • risen
    • stayed exactly the same

  6. Question 6

    Fish species once found farther south are now found in cooler northern waters. This is evidence of…

    • tides getting weaker
    • a lower sea level
    • species ranges shifting as waters warm

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