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Asked by ilovescience111 to Anil, Blanka, Cees, Emma, Mike on 25 Jun 2012.
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Blanka Sengerova answered on 25 Jun 2012:
Because the earth is moving round it own axis in approximately 24 hour cycles. When the side with England (for example) is facing the sun, we have day and when the side is away from the sun, we have night. The length of day and night changes as the earth rotates round the sun in an elliptical cycle in a 365.25 day time period. That’s all in a nutshell, I am sure we could write loads and loads more about the reason for all the different time periods in our solar system.
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Emma Trantham answered on 25 Jun 2012:
I think Blanka’s covered it perfectly: if the Earth didn’t spin, one half would always be in daylight whilst the other was always in the dark, but because it does spin, each half of the Earth gets its turn in the sunshine!
Comments
ilovescience111 commented on :
How hot is the sun?
Emma commented on :
I had to look this up because I’m rubbish at remembering these sorts of numbers:
the surface of the Sun is about 6000 degrees C (as a comparison, the hottest of days in Britain is about 35 degrees C)
the core of the Sun is about 15 000 000 degrees C (I can’t even begin to imagine how hot that would feel!)
sanaheart commented on :
how do you know?
sanaheart commented on :
why do you ask