Grade 7 · Science · Unit 11 of 11
Changing Coastlines
How waves, tides and storms shape the shore, and how people protect it.
What your child practises
Practises how Nova Scotia’s coastlines are shaped by erosion and deposition, the tides of the Bay of Fundy, storm surges and sea-level rise, and how people protect the shore with salt marshes, dykes, living shorelines and seawalls.
Nova Scotia Curriculum learning outcome: Geological Evolution · erosion, deposition, coastal landforms, tides, sea-level rise and ways to protect the coast
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
A long narrow strip of sand or gravel that sticks out from land into the water is a…
- bay
- cliff
- spit
spit
Hint: Spits form when waves and currents drop sand along a shoreline.
Question 2
Which coastal landform is made by erosion?
- sea cave
- beach
- dune
sea cave
Hint: Waves can carve into a cliff and leave a cave. Dunes and beaches are built by deposition.
Question 3
A point of land that sticks out into the sea is a…
- bay
- headland
- dune
headland
Hint: Headlands often stand where the rock is hard and resists erosion.
Question 4
Tides are mostly caused by the pull of the…
- wind
- Moon
- clouds
Moon
Hint: The Moon’s gravity (with the Sun’s) pulls the ocean.
Question 5
Waves crashing against a cliff over many years are most likely to…
- build the cliff taller
- freeze the sea
- wear the rock away
wear the rock away
Hint: Waves carry away small pieces of rock each time they hit.
Question 6
Why is sea level rising around the world?
- the Moon is moving away
- rivers stopped flowing
- warming oceans expand and glaciers melt
warming oceans expand and glaciers melt
Hint: More water and warmer water mean higher seas.