Because Earth's orbit is elliptical, not circular. So, when Earth is farthest away from the sun, it is winter, and when its closest to the sun, it is summer.
Axial Tilt of 23.5 deg. (possibly cause by impact wich also might be the mechanism that created the moon aswell as our iron core, and subsequently our magnetoshpere), with said tilt, as the earth orbits the sun, different parts of the earth experience different length in day, depending on Time of year (position of earth) subsequently, the amount of light received thru-out the day over relative long periods of time, cause the phenomena known as seasons.
If Earth had a tilt of 15 degrees we would experience much less variation in weather during the different seasons.
You can tell by the seasons, if the sun revolved around the earth the temperature would remain constant all year.
No. Earth's orbit is NOT tilted. Earth orbits the Sun in the same plane as the rest of the planets. What IS tilted is Earth's axis of spin (as compared to the plane of its orbit), It is this tilt of this axis that causes the seasons as Earth makes its annual orbit of the Sun.
Earth and Venus DO follow elliptical orbits around the sun (though the orbit of Venus is only very slightly elliptical). Earth's orbit being elliptical is, combined with our axial tilt, why we have seasons.
It is because the earth rotates(orbits) around the sun. :)
When the Earth orbits the sun different sides of the earth face the sun.Therefore changing the temperature.
both hemispheres on Earth experience different seasons. but only the part of earth near the equator have only one season and it's hot which is the tropical areas.
seasons
The different seasons correspond to different constellations. As Earth orbits the sun during the year, we look out at different parts of space and see different patterns of stars as they come into view.
Seasons The difference in solar input between the seasons
As the Earth orbits round the Sun, it also tilts on its axis. When the northern hemisphere tilts towards the Sun, it becomes summer in the north, and winter in the southern hemisphere - and visa-vera.
The Earth has different seasons because it orbits around the sun making it further away during different times of the year. Earth has fall as it moves further away from the suns energy.
We experience seasons because the Earth's tilt wobbles.
The seasons
The Earth orbits around the Sun, while the moon orbits around the Earth.
when the earth was formed is was knocked 23.4* so when the earth orbits the sun it in a different place. this also corses thr seasons