§3.1: water in motion - part 2

• Aardrijkskunde
• Middelbare school
• vwo
• Leerjaar 3

§3.1: water in motion

Today

• Recap previous lesson
• Starting exercise + explanation §3.1
• Assignments workbook 

Three states of water

Precipitation

Infiltration

Surface runoff

Transpiration 

Condensation

Evaporation

Water vapor 

The process of a gas turning into a liquid 

The process of a liquid turning into a gas 

Process by which water on the ground enters the soil 

Water in any form (rain, snow, hail) falling to the ground

The evaporation of water vapor by plats or by vegetation 

Water in its invisible gaseous form 

Water flowing into rivers or lakes because there is more water than the land can absorb 

Transpiration

Condensation

Surface runoff

Precipitation

Infiltration

Evaporation

nu kun je je kennis testen. 

Explain the difference between the short and the long hydrological cycle

Hydrological cycle

Today

• Recap previous lesson
• Starting exercise + explanation §3.1
• Assignments workbook 

Learning goals 

• You can explain why a lot of water is not accessible to humans, using the words: fresh water, ground water and surface water. 


• You can distinguish areas on the map of the world which are (too) dry or (too) wet.

Fresh water 

Salt water

Surface water

Ground water

Glacier

Accessible 

A mass of ice on the land, formed originally from snow 

Something that can be (easily) reached or used 

Water with a low concentration of salt (example: drinking water)

Water with a high concentration of salt (example: seawater)

Water that is no longer visible because it has infiltrated into the ground 

Water that is visible (example: lakes, rivers and seas)

Vocabulary 

Fresh water	Zoetwater	Water with a low concentration of salt (example: drinking water)
Salt water	Zoutwater	Water with a high concentration salt (example: seawater)
Surface water	Oppervlakte-water	Water that is visible (example: lakes, rivers and seas)
Groundwater	Grondwater	Water that is no longer visible because it has infiltrated into the ground
Glacier	Gletsjer	A mass of ice on the land, formed originally from snow
Accessible	Toegankelijk	Something that can be (easily) reached or used

Starting exercise 

Make pairs and answer the following questions:

1. Why is not all fresh water accessible to humans?
   
2. Name four things that we use drinking water for.
3. Compare the average Dutchman with the average Ethiopian:  who uses more drinking water? and why?

Water on earth

• Salt water - fresh water
  
• Surface water - ground water
  
• Solid water - liquid water 
  

The distribution of water

• Salt water
• Fresh water
• Not al fresh water is accessible to humans > why?

The distribution of water

Fresh water:

• Deep groundwater 
• Ice caps and glaciers (water = solid)
• Accessible fresh water

The distribution of water

Accessible fresh water:

• Water in lakes
• Groundwater
• Water in the air (water vapor = waterdamp)
• Water in rivers
• Water in plants 

Drinking water (accessible fresh water) 

What do we use drinking water for?

• Drinking
• Showering
• Flushing the toilet
• Cooking 
• Doing the laundry 

How much drinking water does a person in The Netherlands use on average (per day)?

•  119 liters

How much drinking water does a person in Ethiopia use on average (per day)?

•  20 liters 

Dry and wet areas

• Some areas too dry
• Others too wet 

It's not automatically the case that areas with much precipitation never have problems with water, and that areas with little precipitation have a water shortage

Learning goals 

• You can explain why a lot of water is not accessible to humans, using the words: fresh water, ground water and surface water. 


• You can distinguish areas on the map of the world which are (too) dry or (too) wet.

Explain why a lot of water is not accessible to humans, use the words 'fresh water', 'ground water' and 'surface water' in your explanation.

Look at the map. Which areas are too wet, and which are too dry?

Start homework (§3.1)

• Read §3.1
• Make assignment 2, 4, 5 and 6

Finshed? 

• Have the assignments checked by the teacher 
• Make assignment 1 and 3