If by revolution you mean the spin on it's own axis this is more or less a perfect circle. If you are referring to it's orbit around the sun, this is elliptical, not a perfect circle.
24 i think.
The surface of the earth is called the crust. I hope this is the answer you need.
half of earths layer
The molten iron and medals inside the earths core are the reasons for the earths magnetic core.
no it is not true. there is solid iron and nickel in the Earths core
The tectonic plates below earths surface shape earths landforms
no they are not
sphere
Uranus
24 i think.
A year.
Days & Years.
oval
oblong
Seasons
because of the earths rotation and revolution.
Rotation and Revolution.