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Evaporation micro-lesson

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So, evaporation is the process where liquids change to a gas or vapor. Evaporation occurs when the particles in the liquid, for example, water, have been heated and it’s caused their particles to become looser or freer. Now, these particles leave the surface of the liquid and evaporate into the air. So, there are different factors that will affect the rate of evaporation. That means how quickly it happens or how much it happens. So, these factors are things like the surface area of the liquids and the temperature and if there's any wind present at all. Evaporation increases with an increase in surface area. So, the bigger the surface area, the more evaporation. This is because the large surface area that's exposed to the air means that more molecules can escape into the air. And if there's any wind moving over the water or the land surface, that can also help to carry any of the water vapor, essentially drying the air and leads to an increased evaporation rate. Evaporation happens naturally every single day. For example, after it rains, the puddles may form, and these will then dry up by being evaporated over the course of the day. And similarly, once you've mopped the floor, it won't stay wet for long because it will evaporate.

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Here are some example of questions about this video that kids may be asked in the 1Question app to earn screen time.

  • A liquid will evaporate faster if it is

    1) boiling
    2) frozen
    3) refrigerated
    4) room temperature
  • Evaporation increases with

    1) increased surface area of liquid
    2) decreased surface area of liquid
  • Evaporation is a

    1) process
    2) state of matter
    3) temperature
  • Evaporation is a process where which state of matter changes to which state of matter?

    1) liquid changes to gas
    2) Liquid changes to solid
    3) solid changes to gas
    4) gas changes to solid
  • What factors can you remember which influence the rate of evaporation?

    1) Surface area of liquid, temperature and wind
    2) Moon phase, precipitation, season, and ocean currents
    3) Time of day, soil type, water quality, and cloud cover
    4) Altitude, latitude, and longitude
  • What happens to particles from liquids during evaporation?

    1) They loosen and leave the surface of the liquid into the air
    2) they dissapear into the air
    3) bonds tighten
    4) the move slowly
  • What happens to the temperature to cause evaporation?

    1) rises (heats up)
    2) falls (cools down)
    3) stays the same
    4) fluctuates
  • Why do you think all of the sea does not evaporate?

    1) different temperatures wind and surface areas
    2) Because the sea is too cold to evaporate
    3) Because the sea is too salty to evaporate
    4) Because the sea is too deep for the sun to reach and cause evaporatio

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Meet your educator

Our micro-courses are developed and delivered by qualified educators from around the world.

Georgina Mullin

Georgina Mullin

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