Evaporation
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Evaporation

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Preschool children do science experiment about evaporation

Preschool children do science experiment about evaporation

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Evaporation Evaporation Presentation Transcript

  • Evaporation Malta
  • "Where does the water go?" The children do an experiment with water to try to figure out what happens to water when it is exposed to the air. Where does the water go? Have they ever wondered what happens to the water in puddles after it stops raining?
  • We use a plastic cup and red tape to use as a marker.
  • We mark a water level on the plastic cup.
  • We prepare some water.
  • We fill the cup with water up to the water level mark.
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  • We put the cup on a window sill and observe what happens.
  • We put the cup on a window sill and observe what happens. We leave it there for 5 days. Each day we observe the water disappearing . It is called ‘EVAPORATION’. T he water has gone up into the air. Evaporation occurs when the particles of water become warm enough that they turn into vapours and leave the cup and escape into the air. After 5 days the w ater has all disappeared. It has been evaporated.
  • Day 2 Day 5 Day 4 Day 3
  • The clouds are full of water vapours which have been evaporated.
  • We observe the water.
  • The cup is empty.
  • We do other experiments with water. We put wet paper napkins in a plastic bag. Tie it up and put it in a sunny place. The vapours cannot escape from the plastic bag. We can see the water vapours on the inside of the plastic bag. So the paper napkins do not dry up and remain wet.
  • We wet the paper napkins and tie them up in a plastic bag.
  •  
  • We can see the water vapours inside the plastic bag.
  •  
  • We wet paper napkins
  • We hang the wet paper napkins near the plastic bag. Which paper napkins will dry first?
  • The paper napkins are dry but the ones in the plastic bag are still wet.
  • The water vapours could not escape from the plastic bag.
  • Wet Dry