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A Journey through States of Water

The big picture

Ice, water and vapour are one water. Heat moves the water between forms.

A Journey through States of Water — the whole chapter on one screen
IdeaRemember
Three forms, one waterFreezes at 0 °C, boils at 100 °C. Vapour is invisible.
EvaporationLiquid to vapour at almost any temperature. Faster with surface, warmth and wind.
CondensationVapour to liquid on a cold surface. Drops come from the air.
Melting and freezingOpposite changes. Water is never used up.
The water cycleEvaporation, condensation, rain, flowing back. The Sun drives it.
Cooling by evaporationEvaporating water takes warmth away.

Now open Chapter 8 in your NCERT book. You have tried every idea.

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This track

  1. 0 Start here
  2. 1 The same water, three forms
  3. 2 Evaporation happens all the time
  4. 3 Why a cold glass gets wet
  5. 4 Melting and freezing run in opposite directions
  6. 5 The water cycle never runs out
  7. 6 Evaporation takes warmth with it
  8. 7 The big picture
  9. 8 Track quiz

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