2.1 A world of water

• Aardrijkskunde
• Middelbare school
• havo, vwo
• Leerjaar 2

2.1 A world of water

Aims

After studying this section, you will be able to:

• Describe where water is found in the world and explain why freshwater is scarce;
  
• Explain how rivers are formed, and how they change from the source to the mouth.
  

Distrubution of saline and fresh water in the world.

• Upper course (A) 
• Middle course (B) 
• Lower course (C) 
• A river is a part of the hydrological cycle. 
  

Characteristics of a river:

• Upper course (A) 

• Middle course (B) 

• Lower course (C) 
  

• A river is a part of the hydrological cycle. 
  

In which part of the river does the water flow fastest?

1. Upper course
2. Middle course
3. Lower course
4. It differs

Rivers

Rivers

Drainage basin:

• Area that drains into a river or its tributaries. 
  

Tributaries:

• Smaller side-rivers.

Watershed:

• Boundary between two drainage basins. 
  

Write down 4 things why a rivier could be important 

Cross-section of a river

River bed = Bottom of the river / river banks = sides of the river.

https://www.eduhint.nl/content/contentimages/geo/v2herziening/Ch2/2.9.jpg

Groundwater

Water that is stored underground

Water flows in the groundwater towards the rivers

This occurs when water vapour is turned back into water droplets as it cools down:

1. Evaporation
2. Transpiration
3. Condensation
4. Infiltration

What is an effect of condensation?

1. Evaporation
2. Transpiration
3. Clouds are formed
4. Surface run-off

What word fits the gap?
"Some water ............... deeper into the ground and is slowly transferred back to the river or sea."

1. condensates
2. evaporates
3. infiltrates
4. percolates

Which three forms of precipitation
do you know?

Off to work

2.1: 6,7,9,10