.Water is sticky. The molecules love to stick to things, especially each other. It's what gives it such a large surface tension. It keeps you alive: it means water can pull blood up narrow vessels in the body, often against the force of gravity.
. Water should be a gas at room temperature – all similar molecules, such as hydrogen sulphide (H2S) and ammonia(NH3), are gases. The stickiness of water molecules holds them together as a liquid.
. Water is the second most common molecule in the universe. The most common is hydrogen gas, H2.
. The biggest known cloud of water vapour was discovered by Nasa scientists around a black hole 12 billion light years from Earth. There is 140 trillion times as much water in it as all the water in the world's oceans.
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The Did You Knows
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