Class 6 Science Chapter 8 A Journey through States of Water Revision Notes

Water’s three states in Chapter 8 — solid, liquid, and gas — interconvert through evaporation, condensation, melting, and freezing, all recapped here for a quick read-through.

Last Updated: September 23, 2026

States of Water

• Solid (ice, snow, frost, glaciers): fixed shape and volume.
• Liquid (water): takes the container’s shape, fixed volume, flows/spreads.
• Gas (water vapour): no fixed shape or volume, spreads to fill available space.

Key Definitions

• Evaporation: liquid → vapour; happens continuously, even at room temperature.
• Condensation: vapour → liquid, when vapour touches a cold surface.
• Melting: solid → liquid, on heating.
• Freezing: liquid → solid, on cooling.

Factors Speeding Up Evaporation

• Higher temperature/sunlight
• Larger surface area
• More wind/air movement
• Lower humidity (drier air)

Evaporative Cooling

• Evaporation absorbs heat from its surroundings, causing cooling.
• Examples: sweating, earthen pot (matka), sprinkling water on a hot roof/seat.

Water Cycle

• Evaporation → water vapour rises → condenses around dust particles → clouds form → precipitation (rain/hail/snow) → collection in rivers/lakes/oceans/groundwater → cycle repeats.

Quick revision:

• Revision Notes for Class 6 Science Chapter 1: The Wonderful World of Science
• Class 6 Science Chapter 2 Diversity in the Living World Revision Notes
• Class 6 Science Chapter 3 Mindful Eating: A Path to a Healthy Body Revision Notes
• Class 6 Science Chapter 4 Exploring Magnets Revision Notes
• Class 6 Science Chapter 5 Measurement of Length and Motion Revision Notes
• Class 6 Science Chapter 6 Materials Around Us Revision Notes
• Class 6 Science Chapter 7 Temperature and its Measurement Revision Notes

Frequently Asked Questions

What are the three states of water, and what causes water to change between them?
Water exists as a solid (ice), a liquid, and a gas (water vapour), changing between these states when heat energy is added or removed, causing particles to move closer together or further apart.

What is the difference between evaporation and boiling as ways water changes from liquid to gas?
Evaporation is a slow process occurring at any temperature from the surface of water, while boiling is a faster process occurring throughout the liquid only at a specific temperature, its boiling point.

Written by Satish

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