Important Questions Class 6 Science Chapter 8 A Journey Through States of Water

Water can exist as solid ice, liquid water, and invisible water vapour. Heating and cooling change water from one state to another in daily life.

Water changes form without becoming a new substance. Important Questions Class 6 Science Chapter 8 help students revise evaporation, condensation, melting, freezing, water vapour, humidity, cooling effect, cloud formation, rain, and the water cycle for CBSE 2026. The chapter uses Aavi and Thirav’s lemonade discussion, puddles, steel plates, cold tumblers, matka water, sunlight, wind, and rain to explain state changes. These examples help students answer direct, reasoning, activity-based, and NCERT exercise questions from A Journey Through States of Water.

Key Takeaways

• Three States: Water exists as solid ice, liquid water, and gaseous water vapour.
• Evaporation: Liquid water changes into water vapour.
• Condensation: Water vapour changes into liquid water droplets.
• Water Cycle: Water moves between Earth’s surface and the atmosphere.

Important Questions Class 6 Science Chapter 8 Structure 2026

Important Questions Class 6 Science Chapter 8 With Answers

Important Questions Class 6 Science Chapter 8 With Answers focus on daily observations. Students should connect each answer with experiments from the chapter.

Q1. What Are The Three States Of Water?

Water exists in three states: solid, liquid, and gas. Ice is solid, water is liquid, and water vapour is gas.

These states show different properties. Ice keeps its shape, water flows, and water vapour spreads.

Q2. Are Ice And Water The Same Substance?

Yes, ice and water are the same substance in different states. Ice melts and changes into water.

Nothing new gets added when ice forms. Water becomes ice when it freezes in a cold environment.

Q3. Why Does Water Disappear From Puddles?

Water disappears from puddles due to evaporation and seepage into the ground. Both processes can happen together.

Some water enters the soil. Some water changes into water vapour and mixes with air.

Q4. What Is Water Vapour?

Water vapour is the gaseous state of water. It is invisible in the air around us.

Water vapour forms when water evaporates. Steam contains water vapour and tiny water droplets.

Q5. Why Does Hand Sanitiser Disappear From Hands?

Hand sanitiser disappears because it evaporates quickly. It changes into vapour and spreads into the air.

Rubbing increases contact with air. This helps faster evaporation from the skin.

Class 6 Science Chapter 8 Important Questions On Evaporation

Class 6 Science Chapter 8 Important Questions on evaporation explain drying and disappearing water. Evaporation can happen even at room temperature.

Q1. What Is Evaporation?

Evaporation is the process in which water changes into its vapour state. It can happen at room temperature.

Water on utensils, clothes, floors, and puddles evaporates slowly. Heat and wind can make evaporation faster.

Q2. Why Does Water Disappear From A Steel Plate?

Water disappears from a steel plate because it evaporates into water vapour. It does not pass through the steel plate.

Steel does not allow water to seep through. The disappearing water changes state.

Q3. Why Does Water Disappear Faster From A Hot Pan?

Water disappears faster from a hot pan because heat speeds up evaporation. The water quickly changes into steam.

Steam is water vapour with tiny droplets. The hot surface supplies heat for the state change.

Q4. Give Three Examples Of Evaporation.

Drying of wet clothes, drying of mopped floors, and drying of sweat are examples of evaporation. In each case, liquid changes into vapour.

Water from the surface enters the air. This process continues around us daily.

Q5. Why Does Water Evaporate Faster From A Plate Than A Bottle Cap?

Water evaporates faster from a plate because it has a larger exposed area. More water surface touches air.

A bottle cap exposes less water to air. This slows down evaporation.

Evaporation Class 6 Science Questions For Activities

Evaporation Class 6 Science Questions often test Activity 8.7 and 8.8. Students should compare one changed condition at a time.

Q1. What Condition Changes In The Plate And Bottle Cap Activity?

The exposed area of water changes in the plate and bottle cap activity. The amount of water stays the same.

The plate has more exposed area. The bottle cap has less exposed area.

Q2. What Do We Measure In The Evaporation Activity?

We measure the time taken for complete evaporation. This helps compare faster and slower evaporation.

Shorter time means faster evaporation. Longer time means slower evaporation.

Q3. Why Does Water Evaporate Faster In Sunlight?

Water evaporates faster in sunlight because sunlight gives heat. Heat helps liquid water change into vapour faster.

Clothes dry faster on a hot sunny day. Shade gives less heat.

Q4. Why Does Water Evaporate Faster On A Windy Day?

Water evaporates faster on a windy day because moving air carries water vapour away. This clears space for more evaporation.

Clothes dry faster under a fan. Air movement supports quicker drying.

Q5. Why Does Water Evaporate Slowly On A Rainy Day?

Water evaporates slowly on a rainy day because the air already has more water vapour. This condition means higher humidity.

Humid air accepts less extra water vapour. Clothes dry slowly on rainy days.

A Journey Through States Of Water Class 6 Questions On Condensation

A Journey Through States Of Water Class 6 Questions on condensation explain droplets, dew, clouds, and covered utensils. Cold surfaces help water vapour become liquid.

Q1. What Is Condensation?

Condensation is the process in which water vapour changes into liquid water. It forms tiny water droplets.

Water droplets on a cold glass show condensation. Dew on plants also forms through condensation.

Q2. Why Do Water Droplets Form Outside A Cold Glass?

Water droplets form because water vapour in air touches the cold glass and condenses. The droplets do not come from inside the glass.

The water level inside does not fall. Extra water collects on the outer surface.

Q3. Why Do Dew Drops Form On Plants?

Dew drops form when water vapour in air condenses on cool plant surfaces. This often happens in the morning.

Morning surfaces stay cooler. Water vapour forms tiny drops on leaves and grass.

Q4. Why Do Drops Form Under A Steel Plate Covering Boiling Water?

Drops form because steam touches the cooler steel plate and condenses. Water vapour changes back into liquid water.

The plate surface cools the vapour. Small droplets collect on the inner side.

Q5. What Evidence Shows That Water Does Not Seep From The Glass?

The water level inside the glass does not go down, but droplets collect outside. This shows condensation.

A marked water level helps confirm this. The outside droplets come from water vapour in air.

Condensation Class 6 Science Questions For Reasoning

Condensation Class 6 Science Questions help students explain evidence-based observations. The cold tumbler activity builds scientific reasoning.

Q1. Why Does Mass Increase In The Cold Tumbler Experiment?

Mass increases because water vapour from air condenses on the outer surface. Extra water collects outside the tumbler.

The added water comes from surrounding air. It does not seep through the glass.

Q2. Why Can We Not Conclude Everything From One Observation?

One observation may not prove every possible reason. Students need more evidence to support a conclusion.

Activity 8.4 shows mass increase. Marking the water level gives stronger evidence against seepage.

Q3. What Is Humidity?

Humidity is the amount of water vapour present in air. Higher humidity means air contains more water vapour.

Rainy days usually feel humid. Wet clothes dry slowly in humid air.

Q4. How Does An Atmospheric Water Generator Work?

An atmospheric water generator collects water from humid air by condensation. It cools the air to form water droplets.

This process matches the cold glass activity. Water vapour becomes liquid water.

Q5. Why Is Water Vapour Invisible?

Water vapour is invisible because it is the gaseous state of water. We cannot see individual water vapour particles.

Steam looks visible due to tiny water droplets. The droplets make it appear cloudy.

States Of Water Class 6 Important Questions

States Of Water Class 6 Important Questions test the properties of solid, liquid, and gas. Students should compare shape, flow, and spread.

Q1. How Does Ice Behave As A Solid?

Ice keeps its own shape and does not flow. It remains solid until it melts.

If students move ice to another container, its shape remains mostly the same. This shows solid behaviour.

Q2. How Does Water Behave As A Liquid?

Water flows and takes the shape of its container. It does not have a fixed shape.

Water keeps its volume constant. It can spread on a clean surface.

Q3. How Does Water Vapour Behave As A Gas?

Water vapour spreads through all available space. It has no fixed shape.

It exists in air even at room temperature. It comes from evaporating water.

Q4. How Is A Solid Different From A Liquid?

A solid keeps its shape, while a liquid takes the shape of its container. Ice is solid, and water is liquid.

Ice does not flow. Water flows from one container to another.

Q5. How Is A Liquid Different From A Gas?

A liquid has fixed volume, while a gas spreads through available space. Water is liquid, and water vapour is gas.

Water stays in a container. Water vapour mixes with air.

Class 6 Science States Of Water Questions On Melting And Freezing

Class 6 Science States Of Water Questions on melting and freezing explain heating and cooling. Water changes state without changing into a new substance.

Q1. What Is Melting?

Melting is the conversion of a solid into a liquid. Ice melts and becomes water.

Heating helps ice melt faster. Wax also melts when heated.

Q2. What Is Freezing?

Freezing is the conversion of a liquid into a solid. Water freezes and becomes ice.

A freezer gives a cold environment. This helps liquid water change into solid ice.

Q3. How Can Water Change From One State To Another?

Water changes state through heating or cooling. Heating can change ice to water and water to vapour.

Cooling can change water vapour to water and water to ice. These changes happen in nature and at home.

Q4. Complete The State Change: Solid To Liquid To Gas.

The correct change is solid melts into liquid, and liquid evaporates into gas. For water, ice becomes water and water becomes vapour.

Copyable format:
Solid --melts--> Liquid --evaporates--> Gas

Q5. Complete The State Change: Gas To Liquid To Solid.

The correct change is gas condenses into liquid, and liquid freezes into solid. Water vapour becomes water and water becomes ice.

Copyable format:
Gas --condenses--> Liquid --freezes--> Solid

Melting And Freezing Class 6 Questions

Melting And Freezing Class 6 Questions help students compare opposite changes. Heat and cooling decide the direction of state change.

Q1. How Can Ice Quickly Change Into Water?

Ice quickly changes into water when heat is supplied. This process is melting.

Students can keep ice outside the freezer. Warm surroundings help it melt.

Q2. How Can Water Change Into Ice?

Water changes into ice when it cools enough in a freezer. This process is freezing.

Cooling removes heat from water. Water then becomes solid ice.

Q3. How Can Candle Wax Change State?

Candle wax melts when heated and solidifies when cooled. This shows state change in another substance.

Wax becomes liquid near a flame. It becomes solid again after cooling.

Q4. Why Does Coconut Oil Become Solid In Winter?

Coconut oil becomes solid in winter because cooling changes its state. Low temperature makes it solidify.

It can become liquid again when warmed. This shows reversible state change.

Q5. Does Water Become A New Substance When It Freezes?

No, water does not become a new substance when it freezes. It only changes from liquid to solid.

Ice and water are the same substance. Their states differ.

Evaporation And Cooling Effect Class 6 Questions

Evaporation And Cooling Effect Class 6 Questions explain matka water, sweat, fans, and sanitiser. Evaporation uses heat from nearby surfaces.

Q1. What Conditions Make Evaporation Faster?

Evaporation becomes faster with larger exposed area, more heat, and more air movement. Low humidity also supports faster evaporation.

Water dries faster on a plate than in a cap. Clothes dry faster in sunlight and wind.

Q2. Why Does A Matka Keep Water Cool?

A matka keeps water cool because some water seeps through its surface and evaporates. Evaporation causes cooling.

The earthen pot has tiny pores. Water evaporates from the outer surface and cools the remaining water.

Q3. Why Do We Feel Cool Under A Fan?

We feel cool under a fan because moving air helps sweat evaporate faster. Evaporation takes heat from the skin.

This produces a cooling effect. Wind supports faster evaporation.

Q4. Why Does Sanitiser Feel Cool On Hands?

Sanitiser feels cool because it evaporates quickly from the skin. Evaporation takes heat from the hand.

This lowers the surface temperature. The hand feels cooler for a short time.

Q5. How Does A Pot-In-Pot Cooler Work?

A pot-in-pot cooler works through evaporation from moist sand. The evaporation cools the inner pot.

The sand between two earthen pots stays wet. Fruits and vegetables can remain fresh for some days.

Cooling Effect Class 6 Science Questions For Daily Life

Cooling Effect Class 6 Science Questions connect evaporation with daily summer experiences. Students should explain how evaporation takes heat.

Q1. Why Does Sprinkling Water On A Roof Cool It?

Sprinkling water cools a roof because the water evaporates and takes heat from the surface. This causes cooling.

People use this method in summer. It works better when air movement supports evaporation.

Q2. Why Does Natural Grass Feel Cooler Than Plastic Grass?

Natural grass feels cooler because water from soil and plants can evaporate. Evaporation removes heat from the surroundings.

Plastic grass does not support this natural cooling. It can become hotter in sunlight.

Q3. Why Does A Fan Dry Wet Clothes?

A fan dries wet clothes because moving air increases evaporation. The fan does not need to heat the clothes.

Moving air removes water vapour near the cloth. More water then evaporates from the wet surface.

Q4. How Can Clothes Dry Faster On A Rainy Day?

Clothes dry faster on a rainy day with more air movement and less crowding. A fan can help.

Humidity slows evaporation. Increasing air movement improves drying.

Q5. Why Does Sludge Become Easier To Transport After A Few Days?

Sludge loses water by evaporation when kept in heaps for a few days. This reduces its mass and wetness.

Drier sludge costs less to transport. It also becomes safer to handle.

Water Cycle Class 6 Science Questions And Answers

Water Cycle Class 6 Science Questions And Answers explain how water moves through Earth and air. Evaporation and condensation drive this movement.

Q1. How Do Clouds Form?

Clouds form when water vapour cools and condenses into tiny water droplets. These droplets often form around dust particles.

The droplets float in air. Many such droplets together appear as clouds.

Q2. How Do Clouds Give Rain?

Clouds give rain when many tiny droplets join and become heavy. Heavy drops fall towards Earth.

Under special conditions, water may fall as hail or snow. This depends on air conditions.

Q3. What Is The Water Cycle?

The water cycle is the circulation of water between Earth’s surface and the atmosphere. Water evaporates, condenses, and returns as rain.

Water from oceans, rivers, lakes, and land evaporates. It later returns as rain, hail, or snow.

Q4. Why Does Water Vapour Rise In The Atmosphere?

Water vapour rises because it is lighter than air. It moves upward into cooler regions.

At higher levels, water vapour cools. It condenses and forms droplets.

Q5. Why Are Dust Particles Important In Cloud Formation?

Dust particles help water vapour condense into tiny droplets. Clouds form around these tiny particles.

The burnt newspaper activity shows this idea. Haziness appears when particles help droplets form.

Class 6 Science Chapter 8 Questions And Answers From NCERT Exercises

Class 6 Science Chapter 8 Questions And Answers from NCERT exercises test definitions, examples, and application. These solved answers follow the CBSE 2026 book.

Q1. Which Option Best Describes Condensation?

Condensation is the conversion of water vapour into its liquid state. Correct option: iv.

Water droplets outside a cold glass show condensation. Dew drops also form by condensation.

Q2. In Which Colouring Process Is Evaporation Important?

Evaporation is important in colouring with water colours and acrylic colours. The liquid part dries after use.

Crayons and pencil colours do not depend on water drying. Wet colours need evaporation.

Q3. In Which Writing Process Is Evaporation Important?

Evaporation is important while writing with an ink pen. The liquid ink dries after writing.

Pencil writing does not need evaporation. Ball point ink dries differently but still leaves a mark.

Q4. Give Examples Of Liquids Other Than Water That Evaporate.

Sanitiser, perfume, petrol, and nail polish remover can evaporate. These liquids can change into vapour.

Some evaporate faster than water. That is why their smell spreads quickly.

Q5. How Is Water Present In Solid State In Nature?

Water is present in solid state as snow, hail, ice, and glaciers. These forms appear in cold conditions.

Snow and hail fall from clouds under special conditions. Glaciers store large amounts of ice.

Class 6 Science Chapter 8 Extra Questions

Class 6 Science Chapter 8 Extra Questions help students answer reasoning prompts. These questions connect water states with daily choices.

Q1. How Can A Hot Two-Wheeler Seat Cool Down?

A hot two-wheeler seat can cool down by sprinkling water on it. Evaporation removes heat from the seat.

Wiping with a wet cloth also helps. Water evaporates and gives a cooling effect.

Q2. Why Should We Use Water Wisely?

We should use water wisely because only a small part of Earth’s water suits direct use. Most water exists in oceans.

Population growth increases water demand. Wasting water can cause shortage.

Q3. What Does “Water Is Our Responsibility Before It Is Our Right” Mean?

It means people must save and protect water before claiming its use. Water supports plants, animals, and humans.

Clean water bodies matter for life. Pollution and wastage reduce usable water.

Q4. Why Does The Smell Of Food Spread From The Kitchen?

The smell spreads because gases move through air. Particles from cooked food travel and reach our nose.

This shows that gases spread in available space. Water vapour also spreads through air.

Q5. What Happens When Water On Clothes Dries?

Water on clothes changes into water vapour by evaporation. The cloth becomes dry.

Sunlight and wind speed up this process. Rainy humid air slows it down.

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