why does the earth have seasons?

Answer 1

Seasons are nothing but the variation of temperatures only and as you know not only earth every planet is rotating around the sun. earth is rotating in an axial manner of rotation, so the season depends the distance from the sun to a particular place on the earth.more closer to sun we feel hot and far to sun makes us feel cold.

Answer 2

The tilt of the earth on its axis. When it is tiled one way, the sun hits more directly. When it is tilted the other way, it is more spread out.

Against what you may think, the earth is actually closer to the sun in the winter than in the summer.

The seasons are caused by the change in the tilt of the Earth on it's axis as it revolves around the sun. The axis of the Earth is an imaginary line that goes from the north pole to the south pole of the Earth. This is why (if you are in the northern hemisphere anyway, in the southern hemisphere the seasons are reversed) the sun gradually drifts to the more Southern part of the sky in the winter hitting it's futhermost point at the winter solstice (around December 22 when the longest night of the year occurs) and then drifts back to the Northern part of the sky in the summer, hitting it's futhermost point at the summer solstice(when the longest day of the year occurs).
To help you visualize how the tilt affects day length, get a flashlight and a ball and tilt the ball back and forth in front of the light to observe the way the shadows change. Also, if you have the time, you can build yourself a mini stonehenge by placing markers on the ground to cast shadows during the solstices and equinoxes to really get a good idea of how far the sun moves across the sky through the year.

Answer 3

The earth is tilted on its axis, and thus the amount of energy the north and south hemisphere each receive from the sun will vary, according to whether the northern hemisphere is tilting towards or away from the sun.

The sun is a variable star, and the amount of energy received also varies on a number of multi-year cycles. There is an 11-year cycle for sunspots that plays hell with radio and television transmissions here on earth.

We don't really know much about the longer cycles. For instance, a thousand years ago, it was warm enough that they were raising grapes in England that now only grow in the Mediterranean. While many scientists believe the earth's climate is changing, they're not really sure it's man that is doing it; after all, Mars and Venus are warming, too.

Answer 4

Because the Earth is tilted with respect to the Sun. As the Earth revolves around the Sun, the Sun is closer to one part of the Earth than the other. Also, Earth is in a slightly elliptical orbit around the Sun which also accounts for some of the seasonal changes.

Answer 5

the seasons change as th earth does not stand up right as it revolves around the sun. it has a tilt of 23.5*on on of it's sides. so in junethe north pole is tilted towards the sun so it is summer on the northen side of the earth

Answer 6

because the earth rotates on a slanted Axis of about 23 degrees.

Answer 7

Because the planet is tilted on its axis of rotation, relative to the plane of its orbit around the sun. In winter, the northern hemisphere is tilted away from the sun, and in summer, it is tilted towards the sun.

Answer 8

they have seasons because of the tilt of the earths rotation. that is why there is equinoxes and solstices

Answer 9

because of the tilt in earths axis and its revolution

Answer 10

Because the earths orbit is not a perfect circle. It is an elliptic orbit.