Ellipse.
Gravity.
No, the Earth's revolution around the sun is not related to the rising and setting of the sun on a daily basis, which is caused by the Earth's rotation on its axis.
Venus has the closest period of revolution to Earth, taking approximately 225 Earth days to complete one orbit around the Sun.
The planet that has the shortest period of revolution is Mercury, which is 88 days. The planet with the longest revolution is Neptune, which is 165 years. Earth's revolution is the third shortest.
A year is based on the time it takes Earth to do one revolution or orbit of the sun.
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.
A year.
The year.
Seasons
we call it revolution.
the revolution of earth around the sun
REVOLUTION
Gravity.
Orbit
the heliocentric system and the geocentric system
1' degree per day
Yes.