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A Journey through States of Water

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A white curl rises from a hot cup of chai. It fades into the air. Where does it go?

Where does the white curl go? You are about to find out.

The curl is tiny drops of water. They turn into invisible vapour.

This is Chapter 8 of your NCERT book. It is A Journey through States of Water.

What you will learn

  • Three forms, one water — ice, water and vapour are one water.
  • Heat changes the form — warming and cooling move water between forms.
  • The water cycle — the same water goes round and round.

Need a quick recap?

  • A number for hot (in Temperature and its Measurement). A thermometer gives a number in °C.
  • Hot, cold, or just used to it? (in Track Zero). Your hand is not a good thermometer.

Stay safe

Nothing here needs real heat or cold. Every cup and pot stays on the screen.

Jump to lesson

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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