# Coasts

> Grade 7: erosion and deposition, cliffs, caves, arches and stacks, beaches and spits, protecting coasts.

Source: https://olyclass.com/library/social-g7-coasts-en/

- Subject: History & geography
- Level: Grade 7
- Quiz: 16
- Play it free on one screen (projector, TV or whiteboard): https://olyclass.com/library?play=social-g7-coasts-en
- Copy and edit it: https://olyclass.com/library?copy=social-g7-coasts-en
- Games it plays well in: [Hoop Shot](https://olyclass.com/classroom-games/hoop-shot/), [Penalty Kick](https://olyclass.com/classroom-games/penalty-kick/), [Fishing Pond](https://olyclass.com/classroom-games/fishing-pond/), [Claw Machine](https://olyclass.com/classroom-games/claw-machine/)

## Questions

1. What is it called when waves wear away and remove rock from the coast? (Condensation / Deposition / Erosion / Evaporation)
   Answer: Erosion
2. What is deposition at the coast? (Cliffs being worn away by waves / Rock being broken by frost on land / Sand or stones being dropped by the sea / Waves carrying material out to sea)
   Answer: Sand or stones being dropped by the sea
3. Waves usually deposit material when they gain more energy.
   Answer: False
4. Which process happens when waves throw pebbles against a cliff and wear it away? (Abrasion / Deposition / Longshore drift / Weathering by wind)
   Answer: Abrasion
5. Which of these forms first when waves attack a crack in a headland? (A beach / A cave / A spit / A stack)
   Answer: A cave
6. What is a tall column of rock left standing in the sea after an arch collapses? (A bay / A cave / A spit / A stack)
   Answer: A stack
7. What is the correct order of these landforms as a headland erodes? (Arch, cave, stack / Cave, arch, stack / Cave, stack, arch / Stack, arch, cave)
   Answer: Cave, arch, stack
8. A wave-cut platform is left behind as a cliff retreats.
   Answer: True
9. What is a beach? (A hole in a cliff / A strip of sand or pebbles beside the sea / A tall rock standing in the sea / A wall built to stop waves)
   Answer: A strip of sand or pebbles beside the sea
10. What name is given to the zigzag movement of sand and pebbles along a beach?
   Answer: Longshore drift
11. A spit is a long, narrow ridge of sand that is made by which process? (Abrasion / Deposition / Erosion / Melting)
   Answer: Deposition
12. What do we call a strong wall built along a coast to stop waves hitting the land?
   Answer: A sea wall
13. What are groynes, built out from a beach into the sea, designed to do? (Carry boats to the shore / Dig out the beach / Make waves bigger / Trap sand and slow longshore drift)
   Answer: Trap sand and slow longshore drift
14. Beach nourishment protects a coast by removing sand from the beach.
   Answer: False
15. What are large boulders piled at the foot of a cliff to absorb wave energy called?
   Answer: Rock armour
16. Why might a council choose not to protect a quiet stretch of coast? (Beaches only form behind walls / It costs a lot and few buildings are at risk / Sea walls make waves disappear / Waves never erode that kind of coast)
   Answer: It costs a lot and few buildings are at risk