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CBSE Class 4  >  Class 4 Notes  >  Science  >  Worksheet: Weather, Water and Air - 1

Worksheet: Weather, Water and Air - 1

Q1: Multiple Choice Questions (MCQs).

(i) Which of these does not occur during the water cycle?
(a) Evaporation
(b) Condensation
(c) Pollution
(d) Precipitation
Q1: Multiple Choice Questions (MCQs).

(ii) Water vapour condensed to form ice crystals are called
(a) dew
(b) snow
(c) mist
(d) rain
Q1: Multiple Choice Questions (MCQs).

(iii) Which of the following factors is responsible for weather changes?
(a) Sun
(b) Rotation of earth
(c) Revolution of earth around the sun
(d) All of these

(iv) What kind of weather is the most uncomfortable?
(a) Hot and humid
(b) Hot and dry
(c) Cool and humid
(d) Cool and dry

Q2: True or False.

(i) Hot air is heavier than cold air.

(ii) Temperature is higher on mountains.

(iii) Weather changes are mainly caused by the heat of the sun.

(iv) When clouds are formed close to the ground it is called fog.
Q2: True or False.

Q3: Name the following.

(i) Water vapour cooling to form water_______

(ii) Wind blowing from sea to land _______

(iii) It forms on plants in cold nights _______
Q3: Name the following.

Q4: Fill in the blanks.

(i) The tiny droplets of water present in the air is called _______

(ii) The processes of evaporation and condensation in the nature result in _______

(iii) The water vapour upon cooling forms _______
Q4: Fill in the blanks.

Q5: Answer the following questions in brief.

(i) What are the factors that affect evaporation in the nature?

(ii) Define atmosphere.

(iii) What is water cycle?
Q5: Answer the following questions in brief.

Q6: Long answer type questions.

(i) Why does wind blow from the land to the sea during the day?

(ii) Why do you feel very uncomfortable in hot and humid weather?
Q6: Long answer type questions.


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FAQs on Worksheet: Weather, Water and Air - 1

1. What are the different types of weather and how do they form?
Ans. Weather includes sunny, rainy, cloudy, and windy conditions caused by changes in temperature, air pressure, and water vapour in the atmosphere. Hot air rises and cool air sinks, creating wind patterns. Water evaporates from oceans and lakes, forming clouds that produce rain. These natural processes repeat continuously, affecting daily weather patterns and seasons across different regions.
2. How does the water cycle work and why is it important for life on Earth?
Ans. The water cycle involves evaporation (water turning into vapour from oceans and rivers), condensation (vapour forming clouds), and precipitation (rain or snow falling back to Earth). This continuous movement distributes fresh water across the planet, refills lakes and rivers, and sustains all living organisms. Without this cycle, plants couldn't grow and animals would have no drinking water.
3. Why does air have weight and how does atmospheric pressure affect weather changes?
Ans. Air consists of invisible gases with mass, making it heavy. This weight creates atmospheric pressure-the force exerted by air on Earth's surface. High pressure generally brings clear, dry weather, while low pressure causes clouds and rain. Pressure differences drive wind formation and influence storm development, making it essential for predicting weather patterns.
4. What's the difference between weather and climate and why do students get confused about them?
Ans. Weather describes short-term atmospheric conditions (hourly or daily changes like rain or sunshine), while climate refers to long-term weather patterns over decades or centuries in a specific region. Weather changes constantly; climate remains relatively stable. Understanding this distinction helps students correctly interpret seasonal patterns and environmental studies in Class 4 science.
5. How does temperature affect the behaviour of air and water in the environment?
Ans. Higher temperature causes air to expand and become lighter, rising upward and creating convection currents that produce wind. Warm water evaporates faster than cold water, accelerating the water cycle. Temperature differences between land and ocean drive monsoons and weather systems. These thermal effects directly shape daily weather conditions and regional climate patterns students observe.
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Apr 20, 2026 Last updated
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