Water Class 7 PPT

 Page 1


Water 
Page 2


Water 
In this chapter
?The Water Cycle
?The distribution of 
water in %
?Ocean Circulation 
?Waves
?Tides
?Currents
Page 3


Water 
In this chapter
?The Water Cycle
?The distribution of 
water in %
?Ocean Circulation 
?Waves
?Tides
?Currents
The Water Cycle
The sun ’s heat Cause evaporation of water into 
vapour. When vapour cools down, It  condenses .and 
forms clouds. Form there it may fall on the land or sea in 
the form of rain , snow or sleet.
The process by which water continually changes its 
form and circulates between oceans , atmosphere and land 
is known as the water cycle .
Page 4


Water 
In this chapter
?The Water Cycle
?The distribution of 
water in %
?Ocean Circulation 
?Waves
?Tides
?Currents
The Water Cycle
The sun ’s heat Cause evaporation of water into 
vapour. When vapour cools down, It  condenses .and 
forms clouds. Form there it may fall on the land or sea in 
the form of rain , snow or sleet.
The process by which water continually changes its 
form and circulates between oceans , atmosphere and land 
is known as the water cycle .
Page 5


Water 
In this chapter
?The Water Cycle
?The distribution of 
water in %
?Ocean Circulation 
?Waves
?Tides
?Currents
The Water Cycle
The sun ’s heat Cause evaporation of water into 
vapour. When vapour cools down, It  condenses .and 
forms clouds. Form there it may fall on the land or sea in 
the form of rain , snow or sleet.
The process by which water continually changes its 
form and circulates between oceans , atmosphere and land 
is known as the water cycle .
The major sources of fresh water are the rivers, ponds 
, springs and glaciers.
The ocean bodies and the seas contain salty water. 
The water of the oceans is salty or saline as it contains 
large amount of dissolved salts. Most of the salt that we 
eat.