water and its important question and answers chapter question and answers this chapter question and answer
Answers
Answer:
Explanation:
How much water does a man use daily? Give a rough idea.
Answer:
50-100 litres.
Question 2.
What are the various activities for which water is needed?
Answer:
Bathing
Drinking
Washing clothes
Toilet etc.
Question 3.
Why is water important for us?
Answer:
Water regulates body temperature by the process of respiration and evaporation.
All metabolic reactions in the body take place in aQuestionueous medium.
It transports minerals and food materials in plant’s and animal’s body.
Question 4.
Why rivers originating from Himalayas do not dry during summer?
Answer:
Rivers originating from the Himalayas do not dry up during summers because they continue to get water from the melting snow on the mountains.
Question 5.
What do you mean by potable water?
Answer:
The water which is suitable for drinking is called potable water.
Where do We Get Water From?
Question 1.
Name some sources of water.
Answer:
Hand pump, tube well, river, pond, lake, ocean, etc.
Question 2.
What is the ultimate source of water?
Answer:
Rain.
Question 3.
What tire the different forms of precipitation?
Answer:
The different forms of precipitation are:
Rain
Hail/Snow
Dew.
Question 4.
Is evaporation endothermic or exothermic process?
Answer:
Evaporation is endothermic process.
Question 5.
Can we use the water in the oceans and seas for drinking and other purposes? Why?
Answer:
No, we cannot use the water in the oceans and seas for drinking and other domestic agricultural and industrial needs because it has much salts dissolved in
Water Cycle
Question 1.
What is water cycle?
Answer:
Water cycle: The water cycle is the journey of water from the oceans and other large bodies of water to the land and from the land back to the water bodies. The water cycle is also called the hydrologic cycle. The main driving forces of the water cycle are the sun’s heat and gravity.
Question 2.
What are the different ways by which water vapour is put into the atmosphere?
Answer:
Water in oceans, lakes and ponds gets evaporated due to atmospheric heat. Factories and thermal power stations produce a lot of steam and put it into the atmosphere. Plants throw out water vapour by transpiration. Animals excrete water vapour through respiration and sweating. All this vapour accumulates in the atmosphere.
Answer:
How Much Water Do We Use?
Question 1.
How much water does a man use daily? Give a rough idea.
Answer:
50-100 litres.
Question 2.
What are the various activities for which water is needed?
Answer:
Bathing
Drinking
Washing clothes
Toilet etc.
Question 3.
Why is water important for us?
Answer:
Water regulates body temperature by the process of respiration and evaporation.
All metabolic reactions in the body take place in aQuestionueous medium.
It transports minerals and food materials in plant’s and animal’s body.
Question 4.
Why rivers originating from Himalayas do not dry during summer?
Answer:
Rivers originating from the Himalayas do not dry up during summers because they continue to get water from the melting snow on the mountains.
Question 5.
What do you mean by potable water?
Answer:
The water which is suitable for drinking is called potable water.
Where do We Get Water From?
Question 1.
Name some sources of water.
Answer:
Hand pump, tube well, river, pond, lake, ocean, etc.
Question 2.
What is the ultimate source of water?
Answer:
Rain.
Question 3.
What tire the different forms of precipitation?
Answer:
The different forms of precipitation are:
Rain
Hail/Snow
Dew.
Question 4.
Is evaporation endothermic or exothermic process?
Answer:
Evaporation is endothermic process.
Question 5.
Can we use the water in the oceans and seas for drinking and other purposes? Why?
Answer:
No, we cannot use the water in the oceans and seas for drinking and other domestic agricultural and industrial needs because it has much salts dissolved in
Water Cycle
Question 1.
What is water cycle?
Answer:
Water cycle: The water cycle is the journey of water from the oceans and other large bodies of water to the land and from the land back to the water bodies. The water cycle is also called the hydrologic cycle. The main driving forces of the water cycle are the sun’s heat and gravity.
Question 2.
What are the different ways by which water vapour is put into the atmosphere?
Answer:
Water in oceans, lakes and ponds gets evaporated due to atmospheric heat. Factories and thermal power stations produce a lot of steam and put it into the atmosphere. Plants throw out water vapour by transpiration. Animals excrete water vapour through respiration and sweating. All this vapour accumulates in the atmosphere.
Question 3.
How will you show the presence of water vapour in the air?
Answer:
First, take a clean glass and put some ice cubes in it. Keep it in the open air. After some time, small droplets of water will be observed on the outer surface of the glass. This is because water vapour in the air comes in contact with cold surface of glass and condenses. These droplets of water are due to condensation of water vapour present in the air.
Explanation:
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