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WATER
Page 2


1
WATER
2
What is water?
Water is made of tiny molecules of hydrogen and oxygen. 
Each one is so small that you c a n’ t see it even with the most
powerful microscope.
Pure water has no colour, no taste and do es n’ t smell of anything.
Water exists in three forms on the Earth:
> solid (ice, hail, snow or frost)
> liquid (in lakes, oceans, rain, dew, fog or mist)
> gas (steam or water vapour - "invisible" water in the air).
Page 3


1
WATER
2
What is water?
Water is made of tiny molecules of hydrogen and oxygen. 
Each one is so small that you c a n’ t see it even with the most
powerful microscope.
Pure water has no colour, no taste and do es n’ t smell of anything.
Water exists in three forms on the Earth:
> solid (ice, hail, snow or frost)
> liquid (in lakes, oceans, rain, dew, fog or mist)
> gas (steam or water vapour - "invisible" water in the air).
3
Where can we get water?
About 97% of the water on the Earth's surface is in the world's
oceans.
This is where you can find most of the other 3%:
> Lakes
> Rivers
> Polar ice caps
> Clouds
> Rain
> Stored in rocks (aquifers)
> Sea ice
Page 4


1
WATER
2
What is water?
Water is made of tiny molecules of hydrogen and oxygen. 
Each one is so small that you c a n’ t see it even with the most
powerful microscope.
Pure water has no colour, no taste and do es n’ t smell of anything.
Water exists in three forms on the Earth:
> solid (ice, hail, snow or frost)
> liquid (in lakes, oceans, rain, dew, fog or mist)
> gas (steam or water vapour - "invisible" water in the air).
3
Where can we get water?
About 97% of the water on the Earth's surface is in the world's
oceans.
This is where you can find most of the other 3%:
> Lakes
> Rivers
> Polar ice caps
> Clouds
> Rain
> Stored in rocks (aquifers)
> Sea ice
4
Why do we need water?
To carry nutrients and waste in the body.
To lubricate joints, digestive tract and body tissues.
To cool the body, especially during periods of physical activity.
To be used in factories, agriculture, hospitals, hotels, etc.
Page 5


1
WATER
2
What is water?
Water is made of tiny molecules of hydrogen and oxygen. 
Each one is so small that you c a n’ t see it even with the most
powerful microscope.
Pure water has no colour, no taste and do es n’ t smell of anything.
Water exists in three forms on the Earth:
> solid (ice, hail, snow or frost)
> liquid (in lakes, oceans, rain, dew, fog or mist)
> gas (steam or water vapour - "invisible" water in the air).
3
Where can we get water?
About 97% of the water on the Earth's surface is in the world's
oceans.
This is where you can find most of the other 3%:
> Lakes
> Rivers
> Polar ice caps
> Clouds
> Rain
> Stored in rocks (aquifers)
> Sea ice
4
Why do we need water?
To carry nutrients and waste in the body.
To lubricate joints, digestive tract and body tissues.
To cool the body, especially during periods of physical activity.
To be used in factories, agriculture, hospitals, hotels, etc.
5
How much water do we need?
Most people need about 6-8 glasses of water each day.
Inadequate fluid intake can lead to constipation and dehydration.
Caffeine-containing beverages (coffee, tea, colas, etc.) should not be
drunk because caffeine actually causes you to lose water.
More water may be needed during times of fever, or illness.
Athletes should drink additional amounts before, during and after
exercise.
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FAQs on PPT: Water - Science Class 6

1. What is the importance of water?
Ans. Water is essential for various reasons. It helps in maintaining body temperature, aids digestion, transports nutrients and oxygen, lubricates joints, and flushes out waste products from the body.
2. How much water should one drink in a day?
Ans. The recommended daily water intake varies depending on factors such as age, sex, activity level, and climate. However, a general guideline is to drink at least 8 glasses or 2 liters of water per day.
3. Can drinking water help in weight loss?
Ans. Yes, drinking water can aid in weight loss. It helps to boost metabolism, reduce appetite, and increase the feeling of fullness. Additionally, replacing sugary beverages with water can reduce calorie intake.
4. Is bottled water safer than tap water?
Ans. Both tap water and bottled water can be safe to drink. However, tap water is regulated by government authorities and undergoes strict testing, while the safety of bottled water may vary depending on the brand. It is advisable to check the quality of tap water in your area and consider using water filters if needed.
5. How does water pollution affect marine life?
Ans. Water pollution has a detrimental impact on marine life. It can lead to the death of aquatic organisms, disrupt ecosystems, and harm biodiversity. Pollutants such as chemicals, plastics, and oil spills can contaminate water bodies, leading to long-term damage to marine habitats.
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