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Why is water wet?

Why is water wet?
Oliver Myers Warwickshire (age 5-14)
Beth and jess from Stockton on Tees (aged 5-14)
Luci Murray from Stockton on Tees (aged 5-14)
Beth from Stockton on Tees (aged 5-14)
St.Anselms RC Primary School (Age 5-14)
Lilli from Hertfordshire (age 5-14)
Michael and Ellie from Kent (age 5-14)
Sara from Kent (age 5-14)
Shaira Yeasmin from Swansea (age 5-14)
Sylvia Kucharska-Nguyen from Kent (age 5-15)

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One Response

  1. Why is water wet? There are two answers to this.

    One answer is about what makes liquids stick to surfaces and “wet” them – which is to do with forces between molecules. Water molecules are “polar” – the arrangement of electrons means that electrical charge isn’t evenly spread – and this makes water particularly attracted (electrically) to many surfaces. It also causes water to have lots of other interesting properties.

    But why does water feel wet? This is for a completely different reason. When you have water on your clothes or skin, it normally evaporates into the surrounding air. Evaporation produces cooling, because it takes energy. The feeling of wetness is actually coldness. You can test this by comparing water with another liquid – cooking oil – which doesn’t evaporate so freely. Fill two small cups (egg-cups are ideal) – one with water, and the other with cooking oil. (Young children should ask an adult to help.) Let both liquids come to room temperature for a day, or overnight. Dip one index finger in each liquid, lift them out, and then observe for a few minutes.

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