Not much would change. Note that the seasons are NOT related to changes in the distance from the Sun.
The earths orbit around the sun is almost circular.
The earths orbit around the sun is almost circular.
Earth's orbit (revolution) around the Sun is not circular - it's an ellipse. However, this ellipse is fairly close to a circle.
orbit
Yes. They orbit the Sun and as per Kepler's first law they follow an elliptical path. Do note that a circular orbit is a special type of elliptical orbit.
ALL orbits are elliptical.
circular
An elliptical orbit
A circle is an ellipse, so it's elliptical either way.However, the orbit of Mars is not a perfect circle.
As an elliptical orbit is any orbit that isn't perfectly circular, everything has an elliptical orbit. The planets Mercury and Pluto have the most elliptical orbits of the planets, and are easily seen to be oval shaped. Comets also have highly elliptical orbits.
Circular orbits are unstable; any outside influence (i.e. other planets) will distort them. Elliptical orbits are self adjusting.
No, everything in orbit around the sun has an elliptical orbit, some are just closer to being in a circular orbit than others.