4.2 Flashcards
How does freeze thawing work?
Freeze thawing is the process where wate goes into the cracks of a rock. Overnight, the water freezes, putting pressure on the rock and crack, enlarging it. In the day, the water defrosts and moves further into the enlargedend crack. The process repeats until the rock eventually breaks.
How are misfit rivers/streams created?
These are created when the glaciers passed through. They dragged stones stuck in the bottom along, which scratched the earth. Big enough, they eventually created a stream through a valley.
What is rapid slope process.
A rapid slope process is where gravity or rainwater pulls on a steep hill, dragging mud or scree down to make the slope more stable
What is Scree
Scree is angular rock pieces created by freeze thaw weathering. They are small, broken up pieces.
Where does freeze thaw weathering effect, the uplands or the lowlands
Both areas are effected.
How has sheep farming effected the uplands areas, in particular the Lake District
The sheep eat a huge amount of vegetation grazing. Because of this, the soil becomes harder and the area is more prone to flooding because of less soluble soil.
Has tree farming effected the area
Tree farming has had a huge defect on the land, as lots of wood is needed and used, the forest population has been hugely cut. This allows for less nature
What creates Dry valleys
Dry valleys are where rivers once were. This is caused by Chalk. In wet weather, Chalk is impermeable, such as in the ice age, so that rivers ran in those areas. However, as the climate warmed, the Chalk became permeable, so that the water seeped through the chalk and left the area as a ‘dry valley’.
What is the highest point in the uplands
Scafell pike at 978m
What is the highest point in the lowlands
Crowborugh beacon at 225m
What is the land like in the uplands
The uplands is very hilly, with many lakes, valleys, hills and mountains.
What is land like in the lowlands
In the lowlands, the land is much lower and flatter, a lot less hills, and much lower while measured by sea level.
What is an anticline
An anticline is the formation of many layers of rocks which have been pushed up by the plates below.
Why will the uplands never get highly forested again.
The uplands are infested with sheep farming, causing the saplings to be eaten, causing flooding and more steep slopes.
If contours line on a map of the uplands are close together, what does this mean
That the area is mountainous or has some hills and valleys, it is STEEP.
