erosion and deposition of rivers

Question 1

source (1)

Answer 1

place where river starts

Question 2

mouth (1)

Answer 2

place where river flows into sea

Question 3

river course (1)

Answer 3

length from river source to mouth

Question 4

river land forming abilities (3)

Answer 4

rivers can:

• erode
• transport
• deposit

Question 5

factors that effect river erosion (2)

Answer 5

• speed of water flow

- amount of water in river

Question 6

colour of river (1)

Answer 6

depends of materials it carries in water (can be brown w/ sand)

Question 7

load meaning (2)

Answer 7

material transported in river that wears away the land [silt; sand; stones]

Question 8

how rivers erode (2)

Answer 8

load of river bounce along sides of river, wearing at the bottom and sides of rivers
-causes pieces in load to get smaller

Question 9

sections of river course (3)

Answer 9

• upper course
• middle course
• lower course

Question 10

upper course (6)

Answer 10

• steep gradient (lots of energy causiing erosion)
• narrow + deep
• found high in mountains
• can move big rocks (bcz of energy) {this makes the river deeper by cutting; v shaped valley}
• has tributaries
• has interlocking spurs

Question 11

tributaries meaning (1)

Answer 11

smaller river streams that flow into a larger river

Question 12

interlocking spurs meaning (1)

Answer 12

river winding through spurs in upper course

Question 13

waterfalls (4)

Answer 13

sudden drop of gradient

• occur when theres soft rock after hard rock which eroded faster [and fell into the #plungepool]
• waterfall continuously moves back from erosion
• occur in upper course

Question 14

rapids (3)

Answer 14

fast flowing/turbulent part of river

• uneven river bed due to hard and soft rock eroding at different times
• create bubbles that look like white water

Question 15

potholes (2)

Answer 15

created when stones get swirled around of river current and erode downwards
-river force increases as hole gets deeper

Question 16

middle course (5)

Answer 16

• flows slowly
• has longer tributaries
• mainly erodes but some deposition
• river channel is wider and deeper
• river starts to meander

Question 17

river meander (2)

Answer 17

• outside of river bend flows faster which erodes

- inside of river bed flows slower which deposits

Question 18

oxbow lakes (2)

Answer 18

• forms when river banks meet due to sm erosion

- deposition will cut off old meander and then dries up leaving meander scar

Question 19

lower course (4)

Answer 19

• gentle river slope
• slow river flow
• wide and almost flat river bed shape
• only deposition

Question 20

leeves (1)

Answer 20

build up of borders (leeves made out of sediment) around river edges from floods

Question 21

braided river (2)

Answer 21

• too gentle to carry load

- deposits sediments in middle of river bed and creates braid pattern

Question 22

deltas (2)

Answer 22

• when river reaches large body of water (lake/sea) and overflows
• gentle flow of this river means it will deposit its load and can create new landforms