Subscribe

Grade 4 · Science · Unit 6 of 6

Weathering & Erosion

How water, wind and ice shape the land.

What your child practises

Grade 4 science looks at how weathering breaks rock, how water, wind, ice and gravity move it, and how people slow erosion. On a walk, ask your child to spot places where water or waves are wearing the land away.

Newfoundland and Labrador Curriculum curriculum outcome: Knowledge (by Grade 6) · how weathering, erosion and deposition by water, wind, ice and gravity change the land, and how people can slow erosion

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

    How do sand dune grasses help a beach?

    • They push the sand into the sea
    • They make the sand hotter
    • They turn sand into rock
    • Their roots hold the sand in place

  2. Question 2

    What is deposition?

    • melting ice
    • digging a hole
    • breaking a rock
    • dropping rock and soil in a new place

  3. Question 3

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

    • It shrinks and pulls the rock together
    • It disappears
    • It turns into rock
    • It expands and pushes the crack wider

  4. Question 4

    Where does a river usually drop the most sand and mud?

    • nowhere
    • at the top of a waterfall
    • where it slows down, at its mouth
    • at its fastest part

  5. Question 5

    Which force pulls rocks and soil downhill in a landslide?

    • sound
    • gravity
    • light
    • magnetism

  6. Question 6

    Why is some soil made partly of weathered rock?

    • Rock breaks into tiny bits that mix with rotting plants
    • Soil is made only of water
    • Rocks turn into worms
    • Soil falls from the sky

More Grade 4