rivers

Question 1

what are the 4 types of erosion

Answer 1

hydraulic action, abrasion,attrition,solution

Question 2

what is abrasion

Answer 2

when pebbles grind along the river bank and bed

Question 3

what is attrition

Answer 3

when rocks the river is carrying knock against each other other. they break apart to become smaller

Question 4

what is solution

Answer 4

when the water dissolves certain types of rocks

Question 5

what is hydraulic action

Answer 5

the sheer power of water as it smashes against the riverbanks. air gets trapped in the cracks of the riverbank causing the rock to break apart

Question 6

what are the 4 types of transportation

Answer 6

traction,saltation,suspension,solution

Question 7

what is traction

Answer 7

large pe

Question 8

what is saltation

Answer 8

when pebbles bounce along the riverbed most commonly near the source

Question 9

what is traction

Answer 9

large heavy pebbles are rolled along the riverbed

Question 10

what is suspension

Answer 10

suspension is when the lighter sediment is carried within the water commonly near the mouth of the river

Question 11

what is solution

Answer 11

the transport of dissolved chemicals

Question 12

what is deposition

Answer 12

deposition is when the river loses energy and drops any of the material it has been carrying

Question 13

factors leading to deposition are:

Answer 13

shallow water, when the volume of the water decreases

Question 14

what is the source

Answer 14

where a river begins

Question 15

what is the mouth

Answer 15

where the river meets the sea

Question 16

what is the tributary

Answer 16

a small river or stream that joins a larger river

Question 17

what is the long profile of a river

Answer 17

a long profile is a line representing the river from its source to its mouth. it shows how the river changes over its course

Question 18

what is the upper course

Answer 18

the beginning or upstream part of the river where the rivers load is typically larger as it hasn’t been broken by erosion yet

Question 19

what is the lower course

Answer 19

the land is flatter, the rivers load is fine sediment as erosion has broken down the rocks

Question 20

what is the cross profile

Answer 20

shows the cross section of a rivers channel and valley at a certain point along the rivers course

Question 21

what is interlocking spurs

Answer 21

Interlocking spurs are ridges that form in river valleys when the river winds around obstacles.

Question 22

what is a meander

Answer 22

A meander is when a river curves and bends in a winding pattern, usually forming S-shaped loops.

Question 23

what are oxbow lakes

Answer 23

Oxbow lakes are formed when a meandering river cuts off a meander bend, creating a U-shaped lake.

Question 24

what is a floodplain

Answer 24

a floodplain is an area of land which is covered in water when a river bursts its banks

Question 25

what is a levee

Answer 25

A levee is a natural or man-made embankment that runs alongside a river to prevent flooding.

Question 26

what is an esturary

Answer 26

where the river meets the sea

Question 27

when do waterfalls occur

Answer 27

when there is hard rock on top of soft rock

Question 28

what type of erosion cause the undercutting of a waterfall

Answer 28

abrasion and attrition

Question 29

where on a meander would u find a river cliff

Answer 29

outside bend