The route a river takes to the ssa

The point at which 2 rivers or steams joined together

A stream or smaller river that flows into a large stream or river

Point where river ends (usually when entering sea)

What is a drainage basin

The area of land drained by a river

The area of high ground that separated two drainage basins

The part of a river mouth where the fresh water from the river meets the saltwater of the sea or ocean

Name the 3 stages of a river

1 youthful stage 2 mature stage 3 old stage

What is erosion in rivers

The river wears away and breaks up the landscape along it's channel

What is transportation

The river carries the material that it has eroded

The river drops the material it was carrying

How does hydraulic action cause river erosion

The force of moving water hits and breaks off rock and soil from banks and beds of the river

How does attrition cause river erosion

Attrition is when small stones in a river are worn down and broken up as they hit off eachother

How does abrasion cause river erosion

Abrasion is when small stones carried by a river wears away and breaks off rock along the riverbed and banks by colliding with them causing them to break down further

What is the solutions of river erosion

Rocks e.g limestone and soil are dissolved by acids in the water

A vertical drop in the course of the river in its youthful stage

Step 1 waterfall formation(this is differential erosion)

When a river flows over an area where a band of hard rock e.g granite lies across a band of soft rock e.g sandstone,the soft rock is eroded quicker than the harder resistant rock

Step 2 waterfall formation

This gradually creates a vertical drop,the river falls over the drop as a waterfall,the fall increases in size and the material the river carries creates a deep pool called a plunge pool at its base

Step 3 waterfall formation

The plunge pool gets larger overtime though the process of hydraulic action and abrasion

Step 4 waterfall formation

The water that falls into the plunge pool splashes against the back wall of the waterfall,

Step 5 waterfall formation

The process of solution erodes the back wall,undercutting the waterfall and creating an overhang of rock

Step 6 waterfall formation

Pressure and the force of gravity eventually causes the overhang to collapse

Step 7 waterfall formation

The process repeats itself over time, making the waterfall retreat upstream

Name one example of a waterfall

Aasleagh falls co.mayo(lake gravity falls)

Help

Options

focusNode

Didn't know it?
click below

Knew it?
click below

Don't Know

Remaining cards (0)

Know

retry

shuffle

restart

0:00

Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

Normal Size Small Size show me how

Geo

Rivers chp 9

Question	Answer
What is a source	Beginning of the river
What is a course	The route a river takes to the ssa
What is a confluence	The point at which 2 rivers or steams joined together
What is a tributary	A stream or smaller river that flows into a large stream or river
What is a mouth	Point where river ends (usually when entering sea)
What is a drainage basin	The area of land drained by a river
What is a watershed	The area of high ground that separated two drainage basins
what is a estuary	The part of a river mouth where the fresh water from the river meets the saltwater of the sea or ocean
Name the 3 stages of a river	1 youthful stage 2 mature stage 3 old stage
What is erosion in rivers	The river wears away and breaks up the landscape along it's channel
What is transportation	The river carries the material that it has eroded
What is deposition	The river drops the material it was carrying
How does hydraulic action cause river erosion	The force of moving water hits and breaks off rock and soil from banks and beds of the river
How does attrition cause river erosion	Attrition is when small stones in a river are worn down and broken up as they hit off eachother
How does abrasion cause river erosion	Abrasion is when small stones carried by a river wears away and breaks off rock along the riverbed and banks by colliding with them causing them to break down further
What is the solutions of river erosion	Rocks e.g limestone and soil are dissolved by acids in the water
What is a waterfall	A vertical drop in the course of the river in its youthful stage
Step 1 waterfall formation(this is differential erosion)	When a river flows over an area where a band of hard rock e.g granite lies across a band of soft rock e.g sandstone,the soft rock is eroded quicker than the harder resistant rock
Step 2 waterfall formation	This gradually creates a vertical drop,the river falls over the drop as a waterfall,the fall increases in size and the material the river carries creates a deep pool called a plunge pool at its base
Step 3 waterfall formation	The plunge pool gets larger overtime though the process of hydraulic action and abrasion
Step 4 waterfall formation	The water that falls into the plunge pool splashes against the back wall of the waterfall,
Step 5 waterfall formation	The process of solution erodes the back wall,undercutting the waterfall and creating an overhang of rock
Step 6 waterfall formation	Pressure and the force of gravity eventually causes the overhang to collapse
Step 7 waterfall formation	The process repeats itself over time, making the waterfall retreat upstream
Name one example of a waterfall	Aasleagh falls co.mayo(lake gravity falls)

Created by: user-2005823

"Know" box contains:
Time elapsed:
Retries: