Posted by NICOLE (PLEASE HELP)!!!!!!!!!!!!!! on Sunday, May 10, 2009 at 4:36am.
The diameter of the earth is 7,926.41 miles (12,756.32 kilo). While the earth is rotating the sun it is 92,960,000 miles far from the sun or (149,600,000 kilo). What causes night and day is from how the earth rotates the sun. For certain lengths of time when one side of the earth is facing the sun the other side is't. For the side that is then it is day, for the side that isn't facing the sun it's night
"kk" forgot to give you the source of her information. Possibly these:
http://en.wikipedia.org/wiki/Earth
Scroll down and on the right are the physical characteristics in a sidebar list.
http://www.google.com/search?hl=en&q=what+causes+day+and+night+on+earth&aq=1&oq=what+causes+day+and+
My source was from notes in my class.
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