Class 6 Science - CBSE
A Journey through States of Water
The chapter A Journey through States of Water takes Class 6 students on an exciting exploration of how water exists in three forms—solid, liquid, and gas—and how it continuously changes from one state to another. Students learn about crucial natural processes like evaporation, condensation, melting, freezing, and sublimation, which together make up the amazing water cycle. Understanding this chapter is essential for CBSE board exams as it forms the foundation of environmental science and geography, frequently appearing in both conceptual and diagram-based questions.
Start Learning FreeKey Concepts
States of Water
Water exists in three distinct states: solid (ice), liquid (water), and gas (water vapour), which can change from one form to another.
Evaporation
The process by which liquid water changes into water vapour due to heat from the sun.
Condensation
The process where water vapour cools down and turns back into tiny liquid water droplets, forming clouds and dew.
Precipitation
When water droplets in clouds become too heavy, they fall back to the Earth as rain, snow, sleet, or hail.
The Water Cycle
The continuous movement of water on, above, and below the surface of the Earth through evaporation, condensation, and precipitation.
Important Formulas
Board Exam Info
In CBSE Class 6 Science, this chapter typically carries around 5 to 8 marks. Common question types include defining key terms like evaporation and condensation, explaining the water cycle with a labeled diagram, and giving reasons for everyday observations like drying of clothes or formation of water droplets on a cold glass.
Frequently Asked Questions
Why do water droplets appear on the outer surface of a glass containing ice-cold water?
Water vapour present in the air comes in contact with the cold surface of the glass, loses heat, and condenses into liquid water droplets.
What is the main difference between evaporation and boiling?
Evaporation takes place at any temperature from the surface of water, whereas boiling takes place at a specific fixed temperature (100°C) throughout the entire liquid.
Why does a wet cloth dry faster in the sun than in shade?
Heat from the sun increases the rate of evaporation, turning the water in the cloth into vapour much faster than in the shade.
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