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Why does the moon have craters?

Baby Bear visits the moon in our focus story ‘Whatever Next’ by Jill Murphy, so yesterday we spent some time thinking about the moon. The children shared some fantastic knowledge with me which we recorded as a brainstorm. I was so pleased to hear children using vocabulary such as ‘crates’, ‘full moon’ and ‘crescent’. I asked the children whether the moon is always visible. Most of them said no, only at night time. We discovered that yes, the moon is always there but it’s all to do with its position as well as the position of the sun. The children were keen to tell me about when we have daytime, other countries like Australia have nighttime. We realised this happens because we spin very slowly every 24hours and half the time we face away from the sun whilst the other half of the earth faces it. We had a quick go at representing this by using a torch as the sun, a balloon for earth and a smaller ball for the moon. 
We read the story of Whatever Next and stopped at the page of the moon and talked about the surface of it. It was very bumpy and had ‘hills’ and ‘holes’ known as craters caused by asteroids and meteorites crashing into the moon. We investigated this by dropping stones into flour to observe what happens. We talked about the fact that once a crater is made it stays there forever. We also discovered that if we dropped the rock from higher height it made a deeper crater.