Constructive Process Constructive Process Essential Questions Essential Questions • What are surface features? • What are examples of constructive process? • How can a surface feature be changed by a constructive process? • What are surfaces features caused by constructive processes?
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• How are surface features changed by destructive processes?– Freezing and thawing of the earth’s crust– Freezing water in cracks of rock– Oxidation / rusting – Carbonic acid / acid rain– Impact of organisms– Water / rivers and oceans– Ice / glaciers– Wind– Gravity– Movement of earth’s plates / plate tectonics
• Soil Erosion– Contour plowing– Terracing– Wind breaks– Planting of vegetation– Storm drain management systems
Controlling Constructive and Controlling Constructive and Destructive Processes EQDestructive Processes EQ
• How does technology effect constructive and destructive processes?– Dams –
• Positive Effect– Flood Control– Hydroelectric Power
• Negative Effect– Prevents deposition of flood plains, deltas, and beaches
– Groins –• Positive Effect
– Traps sand that moves along the shore causing the beach to build up.• Negative Effect
– Beach Erosion down stream is worse.
– Seawalls – • Positive Effect
– Protects land behind from ocean waves• Negative Effect
– Ocean side beach will erode
Controlling Constructive and Controlling Constructive and Destructive Processes EQDestructive Processes EQ
• What are examples of technology used to control constructive and destructive processes?– Dams– Groins– Seawalls– Wind Breaks– Contour plowing technique– Terracing technique– Storm Drainage Systems– Beach Nourishment
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1. What landform forms from deposition at the mouths of rivers?
A. a delta
B. a floodplain
C. a sand dune
D. a moraine
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2. Deposition forms these features on coasts.
A. drumlins
B. floodplains
C. barrier islands
D. U-shaped valleys
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3. What causes V shaped valleys to form?
A. deposition at river mouths
B. erosion by rivers
C. weathering by wind
D. erosion by glaciers
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4. A dam across a river can causeA. the formation of a delta.
B. the carving of a valley.
C. the erosion of a beach.
D. the formation of a sea stack.
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5. Which of these helps prevent the harmful effects of erosion?
A. dams
B. volcanoes
C. Long-shore currents
D. contour plowing
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6. In which type of climate are you most likely to find a sand dune tht is not on the coast?
A. dry
B. humid
C. icy
D. hot
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7. What is the purpose of a groin?A. to prevent chemical erosion of rock
B. to release trapped sediment from behind dams
C. to help predict volcanic activity
D. to stop erosion of beaches
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8. What does erosion do? A. breaks down rock physically