The document discusses different forms of condensation in the atmosphere. It explains that condensation occurs when water vapor in the air turns into liquid form due to an increase in water vapor or a decrease in temperature. The main forms of condensation discussed are dew, frost, fog, and mist. Dew occurs as water droplets on surfaces like grass and leaves early in the morning as the surface cools. Frost is similar to dew but forms tiny ice crystals when temperatures fall below 0 degrees Celsius. Fog and mist are condensation around dust particles that can reduce visibility, with fog defined as visibility under 1 km and mist over 1 km.

1. WELCOME
CHAPTER 1 – SUN : THE ULTIMATE SOURCE
PRESENTED BY
SHARAN R
Emmanuel college of B.Ed. Training

2. CONDENSATION
The conversion of a water vapour into a liquid form is called
CONDENSATION
CONDTION:
• Addition of water vapour or fall in temperature, the water
vapour in the atmosphere begins to condense.

3. FORMS OF CONDENSATION

4. • Atmosphere should reach the saturation level for
condensation to begin.
• Addition of water vapour or due to a considerable fall in
temperature.
• Therefore, water vapour in the atmosphere begins to
Condense.
FORMS OF CONDENSATION

5. DIFFERENT FORMS OF CONDENSATION
DEW FROST
FOG / MIST CLOUD
FORMS OF
CONDENSATION

6. 1. DEW
Water droplets clinging on to the blades of grass and leaves
early in the morning. This is called Dew.

7. • The surface of the earth gets cooled during the night and it
cools the near atmosphere.
• This causes the water vapour to condense and the
condensed droplets cling on to the cold surfaces on earth.

8. 2. FROST
• The night temperature falls below 0° Celsius in some places
on the earth.
• Instead of dew, tiny ice crystals are formed in such places.
• This form of condensation is called Frost.

9. FROST

10. 3. FOG OR MIST
Fog or mist is the result of condensation around the
minute dust particles in the lower atmosphere.
• This may obstruct atmospheric visibility.
• If the range of visibility is less than one kilometer, it
is termed Fog.
• If the range of visibility is more than one kilometer,
it is called Mist.

11. FOG :RANGE OF VISIBILITY IS LESS THAN ONE KILOMETER

12. MIST : RANGE OF VISIBILITY IS MORE THAN ONE KILOMETER

13. ACTIVITY
QN : Identify the different form of condensation from
the pictures ?

14. 1 2
3 4

15. QUESTIONS
1. What are the different forms of condensation ?
2. What is meant by Dew ?
3. What is the difference between Mist and Fog ?
4. What is Frost ?