Landforms Landforms created by created by

riversriversLOLO 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, gorgevalley, waterfall, gorge

Starter:

• 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 explanation

Hopetoun Falls, Australia.Hopetoun Falls, Australia.

60 second challenge!!!

Look at the diagram.

Your task is to remember as much as you can, because you will be tested on it very soon.

(You can make rough notes in your book if you want)

Now comes the real test!!!Now comes the real test!!!

Can you draw a Can you draw a largelarge diagram diagram of your own to explain how of your own to explain how waterfalls form?waterfalls form?

Be accurate, neat and quick – Be accurate, neat and quick – you ONLY have 3 minutes to you ONLY have 3 minutes to do this task.do this task.

The 3 minutes are up.

Have you remembered how a waterfall forms?

Hold your work up nice and high for everyone to see!!