Water As a Natural Resource For Class 3 Question & Answer
In this chapter we are going to learn about Water as a natural resource as well as some of important facts about water for kids.
What are the uses of water ?
We use water in drinking, cooking, washing clothes, washing utensils watering the plants etc.
All living things need water to live. some plants also need water to live plants that grow in water are called aquatic plants.
for example lotus, water lily is the example of aquatic plants
Animals also need water to live. they drink water from ponds rivers lake etc.
some animals are living in water they are called aquatic animals like fish octopus whale turtle etc.
Plants that grow in the desert need little water to live .plants that grow in the desert do not have leaves their leaves are modified into spines.
An example is a cactus plant
What are the natural water resources ?
The natural resources of water are rain, seas, oceans, rivers, lakes, and ponds.
But Rainwater is the main source of natural water.
Water from Oceans and Seas cannot be used for drinking because it is very salty in taste.
States of water
Water exists in all three states that are;;
Solid – ICE is a solid form of water.
Liquid – water is liquid form
Gas – Water vapour is a gaseous form of water.
Soluble and Insoluble Material
Material that cannot be dissolved in water is called insoluble material while the material which is completely dissolved in water are called soluble material
for example, milk, salt, sugar is soluble in water
while sand, oil and kerosene are insoluble in water.
Sinking and Floating
The material which sinks in water is heavier than water.
For Example – Metals like iron copper aluminum stone
The material which floats on water is lighter than water.
For Example:- wood, plastic, ice, etc.
Methods of purification of water
In this method, we use filter paper to purify the water .with the help of filter paper we separate those impurities which is not soluble in water.
Boiling is another way to purify water boiling water for 10 to 15 mins can kill the germs present in it.
this is the simplest method to purify water.
In this method, We use chlorine tablets in water to kill germs.
Nowadays we can see that in so many houses people use Water purifiers to clean the water.
Questions and Answers
What is evaporation?
The process in which water is heated and changes into water vapor is called evaporation.
What is condensation?
The process in which water vapor is changed into a liquid form of water is called condensation.
What is melting?
The process in which the solid is heated and changes into liquid form is called melting. Example ice into water
What is freezing?
The process in which the liquid form is converted into a solid form is called freezing. Example of water into ice
Multiple Choice Questions
Water as a Natural Resource -Chapter Grade 3
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