deltas

Question 1

what does sea water contain and what does it lead to

Answer 1

contains charged ions of salt dissolved in it which lead to the flocculation of clay particles

Question 2

what is flocculation

Answer 2

process of material meeting ions of the sea, demonstrates stickiness

Question 3

what happens in the flocculation of clay particles

Answer 3

tiny particles cluster together becoming bigger and more able to stick together and settle to bottom

Question 4

what are deltas formed of

Answer 4

fertile alluvium

Question 5

why do they split into smaller channels

Answer 5

because main channel is disrupted by deposited material

Question 6

what are 3 types of delta

Answer 6

-arcuate
-birds foot
-cuspate

Question 7

what shape are arcuate

Answer 7

fan shaped

Question 8

how do arcuate deltas form

Answer 8

when tidal range is quite low and there is a strong movement of sediment in one direction, keeping seaward edge of delta smooth in shape

Question 9

what are cuspate deltas shaped like

Answer 9

like an arrowhead or a worn tooth

Question 10

how are cuspate deltas shaped

Answer 10

where there is a low tidal range and 2 offshore currents operating in different directions at different times of the year

Question 11

how are birds foot deltas formed

Answer 11

low tidal range and river currents are strong , no clear offshore current so each distributary builds land out to sea like a series of thin conveyor belts

Question 12

what is a tidal range

Answer 12

difference between low+high tide

Question 13

why is a low tidal range needed

Answer 13

needed to deposition can form over time