§1.2 Rocks change

Start-up exersice 
Write down two things you learned last lesson. Use your books to help you if needed
Language to use
What I remember mostly..
We discussed the difference between..
What interested me most was..
timer
4:00
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Slide 1: Slide
AardrijkskundeMiddelbare schoolhavoLeerjaar 2

This lesson contains 21 slides, with interactive quizzes, text slides and 2 videos.

time-iconLesson duration is: 45 min

Items in this lesson

Start-up exersice 
Write down two things you learned last lesson. Use your books to help you if needed
Language to use
What I remember mostly..
We discussed the difference between..
What interested me most was..
timer
4:00

Slide 1 - Slide

Write down two things you learned last lesson. Use your books to help you if needed
timer
3:00

Slide 2 - Open question

§1.2 Rocks change

Slide 3 - Slide

Lesson targets
- You know the difference between mechanical and chemical weathering and how rock weathers

- You understand why the climate affects the nature and speed of weathering.

- Using a drawing you can explain how limestone caves are formed. 

Slide 4 - Slide

Young mountain range
Old mountain range

Slide 5 - Drag question

Welk gesteente hoort bij welke omschrijving?
Rocktype that you can recognise by the spotted colours
Petrified remains of plants or animals found in rocks
This rock forms when molten rock hardens. This can be inside (magma) the earth or outside (lava) it.
Igneous rock
Granite
Fossils

Slide 6 - Drag question

Why is it impossible to find fossils in igenous rocks?

Slide 7 - Open question

Weathering
How can you tell these rocks are weathered?

Slide 8 - Slide

 What is weathering?
 rock crumbling under the influence of the weather and plant growth
Chemical weathering 
Mechanical weathering
Note!
Note!

Slide 9 - Slide

Slide 10 - Video

Causes of mechanical weathering

1. frost: water freezes over during winter, cracks form
2. Big temperature differences in an area> desert
3. Biological weathering: plant roots push rock apart


1
1
2
3
3
Note!

Slide 11 - Slide

Chemical weathering
  • With chemical weathering the composition of the rock changes
  • Due to a chemical process the rock disolves
  • This can form caves
Note!

Slide 12 - Slide

Limestone caves
Hoe ontstaan deze grotten (kalksteen)?




This is due to chemical weathering. Via cracks in the rock rainwater can seep through the limestone. The acidic water can desolve limstone causing caves. You often find stalactites and stalagmites in these caves. 

Slide 13 - Slide

Mechenical weathering
chemical weathering
Cold climates
warm climates
Lots of precipitation needed
some precipitation is enough
Closer to the poles
closer to the equator

Slide 14 - Drag question

Slide 15 - Video

Huiswerk
Please write your homework down in your diaries. Check the homework on the whiteboard
Weathering still dificult?

Slide 16 - Slide

start-up exercise
Discuss with your neighbour which kind of weathering you see in the pictures. Also explain why you think so.

Language to use
A could be a... where as b is possibly a...
On one hand it might be... on the other hand..
... could be a clue for it being a .. 
timer
5:00

Slide 17 - Slide

Find a photo online that shows a weathered landscape. Add which type of weathering this is.

Slide 18 - Open question

Write down 2 things you learned last lesson

Slide 19 - Open question

Slide 20 - Link

Write down one thing you do not understand (yet) this lesson

Slide 21 - Open question