问题描述：
Find the following physical properties of Earth.
1 Diameter (poles to poles)
2 Diameter (equator)
3 Circumference (poles ) (equator)
4 Mass
5 Density
6 Auerage distance to the sun.
7 Period of rotation (1 day)
8 Period of revolution.(1 year)
9 Compare and contrast Earth 's.
Rotationand its Revolution.
10 What causes day and night on the Earth?
11 How does the tilt of the Earth axis combined with the Earth 's Revolution ,causes the occurrence of the seasons?
12 What do the works sostice and equinox mean
How are they related "to the position of the Earth 's axis?
1 Diameter (poles to poles)
2 Diameter (equator)
3 Circumference (poles ) (equator)
4 Mass
5 Density
6 Auerage distance to the sun.
7 Period of rotation (1 day)
8 Period of revolution.(1 year)
9 Compare and contrast Earth 's.
Rotationand its Revolution.
10 What causes day and night on the Earth?
11 How does the tilt of the Earth axis combined with the Earth 's Revolution ,causes the occurrence of the seasons?
12 What do the works sostice and equinox mean
How are they related "to the position of the Earth 's axis?
问题解答：
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