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Grade 4 · Science · Unit 3 of 8

Changing Earth’s Surface

Weathering, erosion, glaciers, earthquakes and volcanoes.

What your child practises

Practises how weathering, erosion and deposition and sudden events change Earth's surface, with the Bay of Fundy's tides as a local example. It follows the Grade 4 science skill descriptors on changes in the Earth's surface in the New Brunswick curriculum.

New Brunswick Curriculum skill descriptor: Scientific Literacy: Sensemaking · explanations about changes in the Earth's surface based on evidence from inquiry

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

    What is weathering?

    • making new rock
    • moving rock with a truck
    • the weather forecast
    • the slow breaking of rock into smaller pieces

  2. Question 2

    What is erosion?

    • rock cooling
    • the movement of weathered rock and soil by water, wind or ice
    • making fossils
    • a kind of storm

  3. Question 3

    How can people reduce erosion on a hill?

    • remove all plants
    • plant grass and trees
    • pour water on it
    • dig deep holes

  4. Question 4

    What happens when water freezes in a crack in a rock?

    • it makes the rock bigger forever
    • it expands and can split the rock
    • nothing happens
    • it melts the rock

  5. Question 5

    What do glaciers do to the land?

    • they cause earthquakes
    • they grow forests
    • they scrape and carve it as they move
    • they make it warmer

  6. Question 6

    A model of erosion with a tray of sand shows…

    • the real size of a river
    • why the Moon shines
    • how water moves sand downhill
    • how mountains are built

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