Page 74 - Science class 4

Chapter at a Glance

³ The sun plays a crucial role in causing a change in weather.
³ Revolution of the Earth changes the seasons while rotation causes day and night.

³ Air is a combination of several gases.

³ Moving air is called wind and gentle wind is called breeze.
³ The strong wind is called a gale.

³ Water exists in three forms, i.e. : solid, liquid and gas.

³ Water can be purified by boiling, decantation, filtration and by chlorination.

Review and Assesseview and Assesseview and Assess
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Based on The Latest Pattern of New Education Policy 2020.
Based on The Latest Pattern of New Education Policy 2020.
Based on The Latest Pattern of New Education Policy 2020.
Based on The Latest Pattern of New Education Policy 2020.
Based on The Latest Pattern of New Education Policy 2020.
Based on The Latest Pattern of New Education Policy 2020.
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(LEARNING WITH PLA
(LEARNING WITH PLA(LEARNING WITH PLA
(LEARNING WITH PLA(LEARNING WITH PLA
(Learning with Fun Containing all the Desired New Styled Questions)
(Learning with Fun Containing all the Desired New Styled Questions)
(Learning with Fun Containing all the Desired New Styled Questions)
(Learning with Fun Containing all the Desired New Styled Questions)
(Learning with Fun Containing all the Desired New Styled Questions)
(Learning with Fun Containing all the Desired New Styled Questions)
You And Your Text
You And Your Text
Fill in the blanks with the correct word :
rotation Earth Water breeze humidity germs
1. The _____________ revolves around the Sun.
2. The moving of the Earth on its own axis is called _____________ .

3. The quantity of water vapours in the air is called _____________ .

4. _____________ exists in nature in the form of solid, liquid and gas.

5. A gentle wind is called _____________ .

6. Boiling water for at least 10–15 minutes kills the _____________ in it.

Clear Approach
Clear Approach

Write ‘T’ for true and for false statements : ‘F’

1. Impure water can make us sick.

2. We can drink water from any source of water.

3. When the air gets heated up due to Sun, it becomes heavy.

4. Cool air is heavier than the hot air.

5. The amount of water vapours present in the air is known its humidity.