Air, Water, and Weather
Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.
Properties and Composition of Air
SubtopicProperties and Composition of Air under Air, Water, and Weather for Grade 4 CBSE.
Preview questions (no answers)
- 1.
Which of the following is true about the composition of air?
A.It is mostly Oxygen
B.It is mostly Nitrogen
C.It is mostly Carbon dioxide
D.It is mostly Water
- 2.
Why does a balloon burst if you keep blowing too much air into it?
A.Because air has no weight
B.Because air exerts pressure on the walls
C.Because air is colorless
D.Because air is cold
- 3.
Air is a form of ____ because it has mass and occupies space.
A.Energy
B.Matter
C.Sound
D.Force
- 4.
Which of these tools is used to show the direction of the wind?
A.Thermometer
B.Wind vane
C.Ruler
D.Scale
- 5.
Air is considered a mixture because ________.
A.It is made of only one gas
B.It has a fixed color
C.It consists of different gases in varying amounts
D.It can be seen easily
- 6.
Why is nitrogen important for living things?
A.It helps in burning
B.It is needed for breathing
C.It is required for the growth of plants
D.It is used in soft drinks
- 7.
The cooling of water vapor to form water droplets is called ________.
A.Evaporation
B.Condensation
C.Freezing
D.Melting
- 8.
A plastic bottle is rinsed with very hot water, emptied, and then immediately capped tightly. After a few minutes, the bottle begins to collapse and crush inward. Based on the logic of air properties shown in the diagram, what is the main reason for this?
A.The plastic material becomes naturally heavier as it cools down, causing it to sink and collapse.
B.The hot water removes the nitrogen from the air, making the bottle lose its internal support.
C.The air inside contracts as it cools, allowing the higher air pressure outside to push the bottle walls inward.
D.Air only exerts pressure when it is being heated, so the pressure disappears when the bottle cools.
- 9.
What is the role of nitrogen in the context of burning?
A.It helps fires burn brighter.
B.It helps to control the rate of burning by diluting oxygen.
C.It is the main fuel for all fires.
D.It turns into carbon dioxide when something burns.
- 10.
Why do we feel more uncomfortable on a humid day than on a dry day at the same temperature?
A.Because there is more oxygen in the air.
B.Because sweat does not evaporate easily from our skin.
C.Because the air is moving too fast.
D.Because there is too much nitrogen in the air.
Download the worksheet for Air, Water, and Weather - Properties and Composition of Air to practice offline. It includes additional chapter-level practice questions.
The Water Cycle and Evaporation
SubtopicThe Water Cycle and Evaporation under Air, Water, and Weather for Grade 4 CBSE.
Preview questions (no answers)
- 1.
If you cover a glass of hot water with a lid, what will you see on the inner side of the lid after some time?
A.Ice cubes
B.Small droplets of water
C.Dust
D.Nothing
- 2.
Which of these factors does NOT speed up evaporation?
A.Large surface area
B.High temperature
C.Strong wind
D.High humidity (moisture in air)
- 3.
When steam comes out of a hot tea cup, what state of water is it?
A.Solid
B.Gas (Water vapor)
C.Liquid
D.Plasma
- 4.
What is the boiling point of pure water at sea level?
A.B.C.D. - 5.
Which of the following diagrams correctly represents the direction of water movement during evaporation?
A.Cloud to Ocean
B.Ocean to Atmosphere
C.Mountain to River
D.Rain to Underground
- 6.
What is the opposite of the process of evaporation in the water cycle?
A.Melting
B.Condensation
C.Boiling
D.Freezing
- 7.
During which process does water return to the Earth's surface?
A.Evaporation
B.Condensation
C.Precipitation
D.Sublimation
- 8.
While the Sun provides the thermal energy for water to evaporate and rise, the force of gravity is responsible for moving water back down to the Earth's surface and through its various collection points. Study the diagram of the water cycle. Which two labeled processes represent movements primarily driven by the pull of gravity?
A.Processes A and B
B.Processes C and D
C.Processes B and C
D.Processes A and D
- 9.
If you increase the humidity in a room where wet laundry is hanging, what will happen to the drying time?
A.It will decrease (dry faster).
B.It will increase (dry slower).
C.It will stay the same.
D.The clothes will get wetter.
- 10.
When you see 'steam' rising from a hot cup of tea, what process are you observing as the steam hits the cooler air and becomes visible?
A.Evaporation
B.Condensation
C.Freezing
D.Melting
Download the worksheet for Air, Water, and Weather - The Water Cycle and Evaporation to practice offline. It includes additional chapter-level practice questions.
Understanding Weather and Seasons
SubtopicUnderstanding Weather and Seasons under Air, Water, and Weather for Grade 4 CBSE.
Preview questions (no answers)
- 1.
The air around us contains tiny droplets of water in the form of gas. What is this called?
A.Dust
B.Water vapor
C.Smoke
D.Ice cubes
- 2.
What is the main and primary source of water on the Earth's surface?
A.Taps
B.Wells
C.Rain
D.Handpumps
- 3.
Collecting and storing rainwater for later use is called rainwater ________.
A.Wasting
B.Harvesting
C.Heating
D.Boiling
- 4.
Why is the monsoon season very important for farmers in India?
A.It brings snow
B.It makes the soil dry
C.It provides water for crops
D.It makes the days very hot
- 5.
When we filter a mixture of sand and water using a filter paper, the sand left on the paper is called the:
A.Filtrate
B.Residue
C.Solution
D.Solvent
- 6.
What is the name of the white, fluffy masses in the sky that are made of tiny water droplets or ice crystals?
A.Stars
B.Clouds
C.Rainbows
D.Fog
- 7.
Which of the following represents the correct order of water cycle processes starting from the Sun's heat?
A.Condensation -> Evaporation -> Precipitation
B.Evaporation -> Condensation -> Precipitation
C.Precipitation -> Evaporation -> Condensation
D.Evaporation -> Precipitation -> Condensation
- 8.
Why is the atmosphere important for life on Earth regarding temperature?
A.It prevents all sunlight from reaching the ground so we don't burn.
B.It traps some of the sun's heat, preventing the Earth from becoming too cold at night.
C.It creates heat by rubbing against the space vacuum.
D.It provides the friction needed to keep the Earth warm.
- 9.
What happens to the temperature of water during the process of evaporation?
A.The remaining water becomes slightly cooler because the fastest (warmest) molecules escape.
B.The water becomes much hotter because it absorbs energy.
C.The temperature of the water stays exactly the same until it is all gone.
D.The water turns into ice before it can turn into vapor.
- 10.
What causes the 'Smog' often seen in big cities during winter?
A.The mixture of smoke from factories/vehicles with natural fog.
B.The condensation of clouds on the ground.
C.The freezing of rainwater as it falls through polluted air.
D.The reflection of city lights on the moisture in the air.
Download the worksheet for Air, Water, and Weather - Understanding Weather and Seasons to practice offline. It includes additional chapter-level practice questions.