Geography.

 On may eight we learned about RIVER.

 Under river we had learned that:

1) Stages of river.

On that lesson we learned that:

1: Erosion: It is the removal of materials from the Earth's surface.

2:Transportation: River transport the eroded materials from higher gradient to lower gradient.

3:Deposition: Deposition of loads take place as the river enters the low lying areas.

Date 14/5/2024.

Stages of River.

1) Upper course or youthful stage.

Rivers are usually small and flow down with lots of energy due to steep gradient.

The features formed in this stage are formed by erosional work.

The main word of a river in this stages is vertical erosion or downward cutting.

Some of the land features formed are V-Shape valleys gorges interlocking supers and waterfalls.

2) Middle or mature stage.

In this stage the river flows through gentle slop.

The volume of river increase with increase in number of tributaries.

The speed of the river decrease due to decrease in slope.

River erodes side wards and it is called lateral erosion. 

The main land features formed in this stage are alluvial fans broad valleys and menders.

3) Lower or old stage.

In this stage the speed of river decrease mainly due to law gradient.

The volume of water also increase.

The main work in this stage is deposition.

Features are: oxbow lakes, flood plains and natural levees.

Atmosphere. 

The envelope of gases surrounding a celestial body, such as a planet or moon. It is held in place by the body's gravity and plays a crucial role in regulating temperature, weather, and supporting life.

1.Troposphere.

  =The lowest layer of Earth's atmosphere, where weather occurs and temperature decreases with altitude.

2. Stratosphere.

  =The layer above the troposphere, from 15 to 50 kilometers high, where the ozone layer absorbs UV radiation and temperature increases with altitude.