Physical Processes That Shape The Coast
Muhtasari
Stand on a beach and watch the waves. Some surge gently up the sand and leave it behind; others crash down and drag it back to sea. Those two kinds of wave, building and destroying, are the engine of every coastline. Add the energy of storms and the steady sideways nudge of longshore drift, and you have the forces that carve cliffs, build beaches and move sand for miles along the shore.
This lesson explains how the sea does its work. You will learn the difference between constructive and destructive waves, the four processes of coastal erosion, how material is transported and deposited, how wave refraction concentrates energy on headlands, and exactly how longshore drift moves sediment along a coast.
Malengo
- Coastal erosion: hydraulic action, corrosion, corrasion, attrition; transportation; deposition; longshore drift.
- Types of waves: constructive and destructive and wave refraction.
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Tathmini ya Somo
Hongera kwa kukamilisha somo la Physical Processes That Shape The Coast. Sasa kwa kuwa umechunguza dhana na mawazo muhimu, ni wakati wa kuweka ujuzi wako kwa mtihani. Sehemu hii inatoa mazoezi mbalimbali maswali yaliyoundwa ili kuimarisha uelewaji wako na kukusaidia kupima ufahamu wako wa nyenzo.
Utakutana na mchanganyiko wa aina mbalimbali za maswali, ikiwemo maswali ya kuchagua jibu sahihi, maswali ya majibu mafupi, na maswali ya insha. Kila swali limebuniwa kwa umakini ili kupima vipengele tofauti vya maarifa yako na ujuzi wa kufikiri kwa makini.
Tumia sehemu hii ya tathmini kama fursa ya kuimarisha uelewa wako wa mada na kubaini maeneo yoyote ambapo unaweza kuhitaji kusoma zaidi. Usikatishwe tamaa na changamoto zozote utakazokutana nazo; badala yake, zitazame kama fursa za kukua na kuboresha.
- The distance of open water over which the wind blows is the: A. swash B. fetch C. backwash D. wavelength Answer: B
- Constructive waves are characterised by: A. strong backwash B. high energy C. strong swash and weak backwash D. short wavelength Answer: C
- Erosion by waves compressing air in cracks in a cliff is: A. corrasion B. attrition C. hydraulic action D. corrosion Answer: C
- Longshore drift moves material along a coast because: A. the backwash carries it up the beach B. the swash moves up at an angle and the backwash returns straight down C. tides pull it offshore D. rivers push it along Answer: B
- Wave refraction tends to concentrate erosion on: A. bays B. beaches C. headlands D. spits Answer: C
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