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A sneeze is a sudden explosion of air from your nose and mouth. You usually sneeze if something tickles the inside of your nose, or if you have a cold.
It is a good idea to cover your nose and mouth when you sneeze, like the man in the picture. A lot of mucous can come out when you sneeze and can travel a long way. If you are sick, you can make other people sick by sneezing near them.
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Snow is what happens to rain when it is so cold that the raindrops turn to ice crystals. Snow is white, can be very soft and you can use it to make snowballs or snowpeople out of.