coastal processes

Question 1

what is mechanical weathering

Answer 1

water temp alternates between 0 and 5
water gets into cracks into rock and freezes+ expands
water melts + condenses which releases pressure
widens rock over time

Question 2

what is chemical weathering

Answer 2

rainwater contains dissolved co2 which forms weak carbonic acid
reacts with rocks which contain calcium carbonate

Question 3

what is a constructive wave

Answer 3

stronger swash than backwash deposits material

Question 4

What is a destructive wave

Answer 4

stronger backwash than swash
removes material

Question 5

what is solution

Answer 5

when rock is dissolved in water

Question 6

what is saltation

Answer 6

pebble sized particles bounced along sea bed

Question 7

what is traction

Answer 7

boulder sized rock moved along sea bed

Question 8

what is suspension

Answer 8

small particles like clay and silt carried in the water

Question 9

where do spits form

Answer 9

on sharp bends in coastline e.g river mouth

Question 10

when do bars form

Answer 10

when two headlands join together

Question 11

durdle door

Answer 11

arch

Question 12

chesil beach

Answer 12

tombolo

Question 13

swanage

Answer 13

headlands and bays

Question 14

lulworth cove

Answer 14

bay

Question 15

what is hard engineering

Answer 15

man made structure

Question 16

what is a sea wall

Answer 16

wall that reflects waves

Question 17

what is a gabion

Answer 17

wire cages filled with stones

Question 18

what are groynes

Answer 18

wooden fences to trap material