Lesson 9 - Unit 2 - preventing flood damage

• Aardrijkskunde
• Middelbare school
• vmbo k, mavo
• Leerjaar 2

 Wearing away the land 

Text

Today's Lesson 

To do:

- Checking answers worksheet 

- Talk: flood damage 

- worksheets

Goals: 

- Know causes and consequences of floods

- Know different ways to prevent floods 

Task 

The start of a river is called: the SOURCE. Glaciers in high mountain areas melt. This water starts flowing and becomes a river.

Weathering mostly occurs at this part of the river, called the UPPER course. Large rocks are slowly broken down into smaller rocks.

One type of weathering is when roots of PLANTS AND TREES grow through ROCKS

The second type of EROSION takes place when WATER gets into cracks and crevices.

The second type of ……………………. takes place when ……………..gets into cracks and crevices.  

Frozen water then ……………………….. and becomes ice, forcing the rock to break into …………………….. pieces.

The third type of weathering happens when ……………………………. have large differences between day and night.

Cold water then FREEZES and becomes ice, forcing the rock to break into SMALLER pieces.

The third type of weathering happens when TEMPERATURES have large differences between day and night.

This happens in mountain regions and desert areas. Rocks expand and contract constantly, causing the rocks to BREAK

WEATHERING is the process of wind, water and ICE shaping the landscape.

………………… cut through this landscape, taking along large amounts of …………………………. along its way.

Sediment such as sand and clay travel much further and faster, then larger stones such as ………….

When the smallest pieces of sediment are dropped (………………………), new land is formed. This mostly occurs at the …………

course of a river. Where a river ends up at sea is called: the …………….of the river.

RIVERS cut through this landscape, taking along large amounts of SEDIMENTS along its way.  

Sediment such as sand and clay travel much further and faster, then larger stones such as PEBBLES

When the smallest pieces of sediment are dropped (DEPOSITED), new land is formed.

This mostly occurs at the LOWER course of a river. Where a river ends up at sea is called: the MOUTH of the river.

Big rocks, heavy weathering, fast water, colder temperature, source

Erosion/ transportation. Slower water, hills 

smaller rocks

Deposition, new land forming, slow water, sand and small sediments, mouth

 Cause and consequence

Class talk: 

What do you think causes floods?

What are some consequences?

Task - Preventing 

1. Read the text of LESSON 2

2. Look at the pictures on the worksheet

3. Match the right description to 
the right picture.

4. Cut out and glue in. 

Task - Cause and consequence

1. Read the statements

2. What is a cause?

3. What is a 
consequence?

4. Make two rows 
5. Put the card in the 
right row. 

Homework

Finish both tasks and place them in your notebook.