1b- coastal landscapes influence by physical factors

Question 1

role of wind in shaping coastal landscape

Answer 1

wave action causes erosion and wave energy is created by the friction of the winds dragging along the ocean surface.

wind can carry out aeolian processes and transport fine sediment between stores.

when fetch and windspeed increase so does wave energy

Question 2

what role does direction of wind play in shaping coastal landscape

Answer 2

the direction of the wind- onshore winds blow towards land and drive waves to the coast. If they blow at an oblique angle LSD occurs

Question 3

role of waves in shaping coastal landscape

Answer 3

destructive waves have a stronger backwash than swash so take sediment away with them, tall in height.
constructive waves have a stronger swash and a weak backwash so move sediment up the beach- short in height

waves against cliffs - hydraulic action and abrasion leads to cliff erosion

Question 4

role of geology in shaping coastal landscape (lithology)

Answer 4

rocks with weak lithology have less resistance to erosion and so will erode easily and are vulnerable to weathering.
Rocks with strong lithology will have more resistance to erosion and weathering like basalt- headlands

Question 5

role of geology in shaping coastal landscape (structure)

Answer 5

rocks that run parallel to coats will create concordant coastlines but rocks that run at angles to the coast will create discordant coastlines.

The angle of dip- landward dipping strata support cliffs with steep profiles. Seaward dipping strata the cliff profile follows the angle of dip

Question 6

role of ocean currents in shaping coastal landscape

Answer 6

generated by the earth’s rotation and convection. Warm currents transfer heat energy towards the poles. Driven by onshore winds so affect western-facing coastal areas.
Cold ocean currents from the poles towards the equator. Cold currents are driven by offshore winds so have less of an impact on shaping the coastal landscape