C2.4 - Lesson 7: Types of coasts

• Aardrijkskunde
• Middelbare school
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• Leerjaar 2

From the mountains to the sea

C2.4: Types of coasts

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What is the plan for today?

START OF THE LAST PARAGRAPH

C2.4: Types of coasts

Rules during class

1. A maximum of one person is speaking.
   
2. Raise your finger or hand if you want to say something.
   
3. Phones are off or quiet and are in your bag
   
4. Always bring your books: Coursebook, workbook, notebook & chromebook.

C2.4: TYPES OF COASTS

Today's goals

1. You can explain how the height and strength of a wave is determined.
   
2. You can give the connection between the strength of the backflow of the sea and the
   build-up or breakdown of the coast. 
3. You can explain how a sedimentary coast eventually leads to the formation of dunes
   (G91).

Sedimentary coast

Sedimentary coast

Coast where the waves leave more material behind than they take away.

You can explain how the height and strength of a wave is determined.

"Movement in a body of water, usually caused by wind blowing over the surface."

Height and strenght depend on three factors:

1. Wind force
2. Length of time that the wind blows
3. Distance travelled by waves

The power of waves

Look at page 30 in your coursebook.

• Figure 14: 7 steps of the power of waves.

Make question 1 in your workbook. Use figure 14.

5 minutes

Abrasion (cliffed) coast

Abrasion coast

Steep coast which forms when the sea erodes the lower slopes.

Erosion: The abrasion of hard rock by water, ice and wind, carrying weathered material.

Erosion: The abrasion of hard rock by water, ice and wind, carrying weathered material.

Erosion: The abrasion of hard rock by water, ice and wind, carrying weathered material.

Erosion: The abrasion of hard rock by water, ice and wind, carrying weathered material.

How are erosion coasts formed?

Write down the numbers in chronological order from left to right.

1. Salt crystals stick together. Because of this, holes and cracks are growing.
   
2. Waves are crashing onto the lower layers of the cliff.
   
3. Because of erosion, a hole is formed in the cliff.
   
4. A part of the cliff is breaking off.
   
5. Salt crystals are left behind in the holes in the cliff.
   
6. Holes in the cliff are becoming too big; upper parts are becoming too heavy.
   

How are erosion coasts formed?

2-3-5-1-6-4

2. Waves are crashing onto the lower layers of the cliff.

3. Because of erosion, a hole is formed in the cliff.

5. Salt crystals are left behind in the holes in the cliff.

1. Salt crystals stick together. Because of this, holes and cracks are growing.

6. Holes in the cliff are becoming too big; upper parts are becoming too heavy.

4. A part of the cliff is breaking off.

Let's go!

• Read the text at page 30/31 of your coursebook.
  
• Make exercises 1, 2, 3, 4 & 5 of paragraph 4 in your workbook.
• Read GeoGuide numbers 93 and 94. - Use the atlas!

Rules while working:

• You work alone and in silence.
  
• Raise your finger if you've a question.
  
• Always read the exercise well before you ask your question.

Homework for next lesson

Make exercises 1, 2, 3, 4 & 5 of paragraph 4 in your workbook.