3.1 Water is moving

3.1 Water is moving




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AardrijkskundeMiddelbare schoolvmbo t, mavo, havo, vwoLeerjaar 2

This lesson contains 34 slides, with text slides and 1 video.

time-iconLesson duration is: 45 min

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3.1 Water is moving




Part 1

Slide 1 - Slide

Get your notebook and a pen.
Answer these questions:
1. Would you build a village here?
2. Why would you or wouldn't you build a village here?

Slide 2 - Slide

Learning outcomes 3.1
- You know how the short and long water cycle works and in which forms water is stored.
- You understand why a lot of water is unsuitable or inaccessible to humans.
- You can explain how ocean currents arise and why they have consequences for the areas they flow to.

Slide 3 - Slide

Small and long water cycle

Slide 4 - Slide

Small and long water cycle

Slide 5 - Slide

The small water cycle
  • Water cycle = "the process by which seawater flows back to the sea after evaporation from the sea via clouds, precipitation, groundwater and rivers."
    The sun is the engine here.
  1. Seawater evaporates by the sun.
  2. Water vapor rises, cools and condensates: clouds with precipitation.
  3. The rainwater goes back into the sea.

Small water cycle

Slide 6 - Slide

The long water cycle
The long water cycle
  1. Seawater evaporates by the sun.
  2. Water vapor rises, cools and condensates: clouds with precipitation.
  3. The wind blows the clouds over land.
  4. Precipitation falls over land and the water returns to the sea via rivers and as groundwater.

Slide 7 - Slide

Slide 8 - Video


Forms of water in the water cycle:
2. Liquid:
- Rain
1. Fixed:
- Ice or snow
3. Gaseous:
- Water vapour

Slide 9 - Slide

Long water cycle
  • Evaporation
  • Condensation
  • Precipitation
  • Infiltration

Slide 10 - Slide

Make ex 1 and 2 on page 122

Slide 11 - Slide

Write in your notebook the differences between the small water cycle and the long water cycle.

Slide 12 - Slide


In the small cycle, the evaporated seawater returns directly to the same sea as precipitation.
In the long cycle, rain or snow ends up on the mainland. It can take a very long time before the water returns to the sea.

Slide 13 - Slide

Look at Source 7 in your book on page 121.


We have Fresh water and Salt water.


Slide 14 - Slide

3.1 Water is moving
Part 2

Slide 15 - Slide

Learning outcomes 3.1
- You know how the short and long water cycle works and in which forms water is stored.
- You understand why a lot of water is unsuitable or inaccessible to humans.
- You can explain how ocean currents arise and why they have consequences for the areas they flow to.

Slide 16 - Slide

What is the difference again between the small and long water cycle?

Slide 17 - Slide

What could we drink?
Salt water or Fresh water?

Slide 18 - Slide

Salt water



Salt water is water in which salt has been dissolved. Salt water contains more salt than a person can process when drinking it, because salt absorbs moisture. Drinking salt water will only make you thirstier and drinking large amounts can cause poisoning and it will dehydrate your body.

Slide 19 - Slide

Fresh water


Fresh water is drinkable. But fresh water in lakes, surface water and groundwater is often so polluted that it is dangerous to drink without purification.

Slide 20 - Slide

Fresh water vs. salt water
  • 97,5% salt water
  • 2,5% fresh water

Slide 21 - Slide

> water extraction in 3 ways

1. groundwater
2. surface water
3. surface water with dune infiltration

Slide 22 - Slide

Groundwater

Rainwater sinks into the ground.

This means there is a lot of water deep underground. This water in the ground is called groundwater.


 In some places the groundwater is not that deep. In those places you can already see the water if you dig a hole one meter deep.


Slide 23 - Slide

Surface water
Water in rivers, lakes and ditches is called surface water.

 Surface water can be seen everywhere in the country.

 Surface water is called freshwater. Surface water contains little salt.

Slide 24 - Slide

Slide 25 - Slide

Land ice and glaciers
(solid form)
Most freshwater is frozen - 69% of all freshwater.

Land ice - Ice on land.

Glacier - Ice mass in the mountains.

Slide 26 - Slide

Drinking water purification from groundwater

Slide 27 - Slide

Drinking water purification from surface water

Slide 28 - Slide


Write in your notebook what the difference is between groundwater and surface water.

Slide 29 - Slide



Surface water can be found in oceans, seas and lakes, for example. Groundwater is water that has seeped into the soil and rocks.

Slide 30 - Slide

Ocean currents
Warm ocean current = Ocean current that carries warm water from the equator to higher latitudes.
Cold ocean current = Ocean current that carries cold water from the polar regions to lower latitudes.

Slide 31 - Slide

Slide 32 - Slide


These ocean currents have a major influence on the climate.

Slide 33 - Slide

Homework Geo
3.1: 3, 4 and 6

Slide 34 - Slide