Grade 7 · Science · Unit 7 of 11
Weathering & Erosion
How water, wind and ice shape the land
What your child practises
Practises how weathering, erosion and deposition wear down and rebuild Earth’s surface, including coastlines and soils.
Prince Edward Island Curriculum curriculum outcome: Earth’s Crust · how weathering, erosion and deposition shape Earth's surface
Sample questions
A taste of this unit. In the app, questions change every time and get easier or harder to match your child.
Question 1
Why is Prince Edward Island’s soil red?
- It is full of red lava
- It has iron in the weathered sandstone
- It is covered in red algae
- It is painted red
It has iron in the weathered sandstone
Hint: Rusted iron gives colour.
Question 2
Beaches on Prince Edward Island are mostly made of…
- volcanic ash
- frozen lava
- broken fossils only
- sand and sediment dropped by waves
sand and sediment dropped by waves
Hint: Waves carry sand and drop it in calm places.
Question 3
Which describes how a sea cave forms?
- Waves wear away weak rock in a cliff
- Lava hardens into a hole
- Wind builds a dune
- A river deposits sand
Waves wear away weak rock in a cliff
Hint: Waves hit the base of the cliff again and again.
Question 4
What did glaciers leave behind as they melted?
- volcanoes
- piles of rock and sediment
- empty ground
- new mountains of lava
piles of rock and sediment
Hint: They dropped what they carried.
Question 5
Which of these is erosion?
- A river carries sand downstream
- Rust forms on a stone
- Sand settles at a river mouth
- A rock cracks from frost
A river carries sand downstream
Hint: Erosion is about moving material.
Question 6
Which is the slowest process?
- a flash flood
- weathering and erosion of rock
- a volcanic eruption
- a landslide
weathering and erosion of rock
Hint: It can take thousands of years to change the land.