Quiz: Weathering and Erosion

1. The breaking down of rocks into smaller particles such as sand and pebbles is:
A weathering
B erosion
C done only by animals
2. Weathering of rocks which does involve the action of chemicals is:
A chemical weathering
B physical weathering
C erosion
3. Exfoliation or flaking of rocks due to expansion in extremely high daytime temperatures with contraction in extremely low night time temperatures is a form of:
A erosion
B physical weathering
C chemical weathering
4. Weathering by abrasion occurs by agents such as:
A wind and water
B gravity
C tree roots
5. Water can break down rocks because:
A water carries strong acids that erode rocks
B water takes up less space when it freezes and rocks collapse inward
C water expands when it freezes in cracks in rocks
6. City council regulations ban the planting of certain trees near buildings because:
A tree roots can damage and break down concrete
B the tree sap is poisonous to humans
C trees create shade and the temperature extremes can break concrete
7. An example of physical weathering by animals is when:
A insects damage flowers when they are obtaining nectar
B tree roots break up concrete slabs
C people walk on grass instead of the designated paths
8. What weathering chemicals are made by decaying plants?
A alkalis
B acids
C salts
9. What is formed when gases such as carbon dioxide, sulphur dioxide and nitrogen oxides mix with rain?
Aerosion
Bacid rain
Clichens
10. Many people do not plant climbing vines near their homes because:
Athe decomposing leaves release acids that break down paint and concrete
Bplants erode concrete
Cthe plants encourage insects whose excreta can greatly damage concrete
11. A lichen is a combination of:
Aa moss and a liverwort
Ban alga and a fungus
Ca moss and a fungus
12. Erosion by water occurs in:
Asummer
Bthe ocean only due to wave movement
Crivers, ocean waves and glaciers
13. Many sandy beaches are particularly prone to erosion as a result of:
Atides
Brain
Chuman pedestrians
14. When a rock falls from a cliff face, the agent of erosion is usually:
Awind
Bman-made
Cgravity
15. Apart from water and gravity, other erosive agents are:
Aice and wind
Bwind, animals and machinery
Cno other agents of erosion
 
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