Crop Weather Relationships

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Module 3 Weather Elements
Virtual Academy for the Semi Arid Tropics
Modules
Lessons

Lesson 7 Cloud Cover
After completing this Lesson, you will be able
to answer 1. What are clouds? 2. How
clouds are formed? 3. What type of clouds
you observe in the sky? 4. How rain giving
clouds look like?
Course on Crop-Weather Relationships
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Lesson 7 Cloud Cover

• Clouds are suspended water in the atmosphere.
• Clouds are usually the most obvious feature of
  the sky.
•  
• Clouds give us a clue about what is going on in
  our atmosphere and how the weather might change
  in the hours or even days to come.
•  
• Each type of cloud forms in a different way, and
  each brings its own kind of weather. 

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Lesson 7 Cloud Cover

• Clouds form when the air rises.
• When air rises, it expands and gets colder.
• The colder air cannot hold as much water as
  warmer air.
• As the temperature and air-pressure continue to
  drop, tiny water droplets group together into
  clumps called cloud droplets.
• At this point, the parcel of air becomes as
  visible cloud.

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Lesson 7 Cloud Cover
Types of clouds There are three basic kinds of
clouds based on the shape.

• Clouds which are
• Curly, thin and, feathery
• They are high in the sky.
• They are are made up of ice particles.
• They are generally white or whitish in color.
• Signals changing weather.

Thin and feathery clouds
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Lesson 7 Cloud Cover
Types of clouds There are three basic kinds of
clouds based on the shape.

• 2. Clouds which are
• Like puffs of cotton piled in a heap.
• They are commonly known as fair weather clouds.
• They are usually nearer the earth.

Fair weather Clouds
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Lesson 7 Cloud Cover
Types of clouds There are three basic kinds of
clouds based on the shape.

• 3. Clouds which are
• Low, and flat.
• They are often dark and bring rain or snow.

Dark Clouds
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Lesson 7 Cloud Cover

• Types of clouds
• So, observing the clouds you can tell what type
  of weather you can expect in your surroundings.
• The cloud formation over a region can be seen as
  satellites take pictures of clouds from space.

Satellite picture of Clouds
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Module 3 Weather Elements
Virtual Academy for the Semi Arid Tropics
Modules
Lessons
Exercise

This concludes Lesson 7 on Cloud Cover, and also
this Module.
To check your knowledge about weather elements,
click Exercise button.
In the next Module, you will learn about
the relationship between weather and growth of
crops. Click Modules button to select Module 4
Course on Crop-Weather Relationships