Lesson -16, water (post 3)

Good morning boys ! Welcome to the next class of science.
Try to  recall what you learnt in the last class by answering the following questions-
GIVE THE SCIENTIFIC TERMS FOR THE FOLLOWING-
1.The minimum depth in the soil where all the pores are filled with water.
2. Huge reservoirs of water inside the earth.
3. The process of seepage and percolation of surface water into the grounnd.
LEARNING OUTCOMES OF TODAYS CLASS ARE-
By end of this class you will be able to-
-list the factors that affect and cause the lowering of the water table
-list the major causes of ground water depletion.

The factors that affect the water table are -
.average rainfall 
. use of ground water.
The causes of the lowering of water table are-
. poor rainfall
.excessive use of groundwater ( when the groundwater pumped out is more than the water that seeps in, the water table gets lowered)

CAUSES OF GROUNDWATER DEPLETION ( depletion of water table ) 
The major causes are-
1) Increase in population has caused increased demand of water ,thus resulting in the depletion of groundwater.
2)Construction activities has resulted in more land to be made concrete, that has resulted in reducing the rate of water seepage, which has resulted in the lowering of ground water and water table.
3)Reduced forest cover due to increasing demand of land for construction purposes has reduced seepage of ground water, thus resulting in depletion of water table and groundwater.

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HOTS!
1. Will the water table be lower in villages or in cities? Why ?
2. Is water equally distributed in our country ? Give a reason to support your answer.

HOME WORK
1. Read pages259-260 of the reader.
EXERCISES TO BE DONE IN YOUR NOTE -BOOK

7. List the factors that affect the water table.
ans: The factors that affect the water table are -
.average rainfall 
. use of ground water.

8.What the major causes of ground water depletion?
ans : The major causes of ground water depletion are_
a) Increase in population
b) Increase in industrial and agricultural activities
c) Construcyion activities 
d) Reduce forest cover

SDG-Clean water and sanitation.

REFLECT... Are clean water and sanitation linked with each other?