A Journey through States of Water
Class 6 · Science
5 ideas in Class 6 Science, explained in plain words, with games and quizzes to practise.
Solid, Liquid and Gas States
Part of: Three states of water
Water can be a solid (ice), a liquid (the water we drink) or a gas (water vapour). They are the same substance in different states. Ice keeps its own shape, water takes the shape of its container, and vapour spreads into all the space it can find. Heating melts ice and cooling turns water back into ice.
Why it matters. Knowing that one substance can appear in three forms explains puddles, steam, frost and clouds. Without it, children think ice, water and steam are three unrelated things.
Try it in two minutes
- Put an ice cube in a glass and a spoonful of water in a bowl. Ask: which one keeps its shape if you tilt the container?
- Pour the water into a tall glass. Ask: did the water change its shape? Did the amount change?
- Leave the ice cube out for a few minutes. Ask: what is it turning into, and what must be added for this to happen?
Try at home. Ask your child to name one other thing at home, such as ghee or candle wax, that is solid when cool and runny when warm.
Evaporation of Water
Part of: Evaporation
Evaporation is liquid water changing into water vapour. It happens even at room temperature. A wet towel on a line, a mopped floor and a puddle after rain all become dry because their water slowly turns into vapour and goes into the air.
Why it matters. Evaporation explains why washing dries, why puddles vanish and why sweat dries. Children who skip this idea often think the water just soaked away or disappeared.
Try it in two minutes
- Put one spoon of water on a steel plate and mark its edge with a pencil dot. Ask: where do you think the water will go?
- Check after a few minutes. Ask: did the plate become wet underneath? What does that tell us?
- Ask your child to point out two more things at home that dry up on their own.
Try at home. Let your child watch a wet handprint on a dry floor over some minutes and describe what happens.
What Makes Evaporation Faster or Slower
Part of: Evaporation
Water evaporates faster when it is spread over a larger area, when it is warm, and when air is moving. It evaporates slower when the air already holds a lot of water vapour, which is called humidity. That is why clothes dry quickly on a hot, windy day and slowly on a damp, rainy day.
Why it matters. These ideas help children make sense of everyday life, such as how to dry clothes faster. They also teach fair testing, where only one thing is changed at a time.
Try it in two minutes
- Pour the same amount of water into a small cup and onto a wide plate. Ask: which will dry first and why?
- Place a spoon of water in sun and another in shade. Ask: what did we change and what did we keep the same?
- Ask: how could we dry a wet cloth faster on a rainy day?
Try at home. Hang two identical wet cloths, one folded and one spread open, and let your child check which dries first.
Condensation of Water Vapour
Part of: Condensation
Condensation is water vapour turning back into liquid water. This happens when vapour in the air touches something cold. Drops on the outside of a cold bottle come from the vapour in the air, not from inside the bottle.
Why it matters. Condensation explains dew, mist on mirrors and drops on cold glasses. Children often believe the glass leaks, and this idea corrects it.
Try it in two minutes
- Fill a steel glass with ice-cold water and leave it on a table. Ask: what do you see on the outside after a few minutes?
- Mark the water level with tape. Ask: has the level gone down? What does this tell us about leaking?
- Hold a cold steel spoon near your mouth and breathe out gently. Ask: where did the mist on the spoon come from?
Try at home. Ask your child to compare a glass of cold water and a glass of room-temperature water on the table and report which one gets drops.
Clouds, Rain and the Water Cycle
Part of: Water cycle
Water from oceans, rivers and the ground evaporates into the air. High up, the air is cooler, so the vapour condenses into tiny droplets around dust and forms clouds. When the droplets join and become heavy, they fall as rain, hail or snow. The water flows back to oceans, and this circulation is the water cycle.
Why it matters. The water cycle explains where rain comes from and why water is limited. Without it, children may think water is endless and can be wasted.
Try it in two minutes
- Heat water in a pot and hold a cold steel plate above the steam. Ask: what forms on the plate?
- Ask: where was the water before the plate, and where does it go next?
- Draw a simple circle together: ocean, cloud, rain, river, ocean.
Try at home. Ask your child to list three small ways your family can save water during the week.
What your child will practise
- Clouds, Rain and the Water Cycle: Jungle Quick Fire (Quick Fire)
- Condensation of Water Vapour: Treasure Quest (Collect the Answer)
- Evaporation of Water: Space Puzzle (Clue Puzzle)
- Solid, Liquid and Gas States: Ocean Sort (Sort It Out)
- What Makes Evaporation Faster or Slower: Weather Sort (Sort It Out)
- Quiz: Clouds, Rain and the Water Cycle (8 questions)
- Quiz: Condensation of Water Vapour (8 questions)
- Quiz: Evaporation of Water (8 questions)
- Quiz: Solid, Liquid and Gas States (8 questions)