Landforms Landforms created by created by rivers rivers LO LO To know how v- To know how v- shaped valleys and, shaped valleys and, waterfalls form. waterfalls form. Key words: Key words: Spurs, source, v-shaped Spurs, source, v-shaped valley, waterfall, gorge valley, waterfall, gorge
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• Write down 3 facts that you learned last lesson• Now compare your 3 facts with your friends• Now write down what you think is the best fact that
you learned last lesson is.• Be prepared to be asked what you think this fact is.
Look closely at this photo; write in your books what you Look closely at this photo; write in your books what you think it is.think it is.
(River, hidden (River, hidden by rocks)by rocks)
It’s a V shaped valley.It’s a V shaped valley.Did you get it?Did you get it?
Forming a V shaped Valley
The river cuts The river cuts downwardsdownwards like a saw. like a saw.This happens in the upper part of the river and This happens in the upper part of the river and makes the valley go deep.makes the valley go deep.Rain erodes the edges to make it wider at the top.Rain erodes the edges to make it wider at the top.
Vertical Vertical erosion is erosion is dominantdominant
Make a neat copy of the diagram in your books – you Make a neat copy of the diagram in your books – you only have 8 minutes so be quick.only have 8 minutes so be quick.
Interlocking spurs and a V-Shaped valleyInterlocking spurs and a V-Shaped valley
What is this?
How is it formed?
What have you just seen?How do you think it is formed?
So how do waterfalls form?Whole class spider diagram on board
Ideas
Quick explanationHopetoun Falls, Australia.Hopetoun Falls, Australia.