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2007-12-25 17:21:07 · 7 answers · asked by er_jsandhu 1 in Science & Mathematics Weather

7 answers

Earths axis is tilted,so the angle at which the sun's rays strike the earth changes from month to month as the earth revolves around the sun.This causes the variations in daylight length.This daylight length is maximum in summer and minimum in winter.
If there is no tilt in the earth's axis and the axis had been perpendicular to the orbital plane,the day and the night would have been equal on the earth's surface throughout the year.
So ,the tilt and the revolution both cause the the variations in the daylight length and the change of seasons also.
In winter(N.H),the northern hemisphere tilts away from the sun and hence the daytime is less.In summer, the northern hemisphere tilts towards the sun and hence the daytime is longer.

2007-12-26 01:01:49 · answer #1 · answered by Arasan 7 · 0 0

The amount of daylight in the wintertime is less because the axial tilt of the Earth combined with Earths rotation results in the apparent track of the Sun across the sky being considerably shorter. This effect is magnified as you get closer to the poles, where during the Fall and Winter the Sun is continuously below the horizon, but continuously above the horizon during the Spring and Summer.

2007-12-26 04:25:31 · answer #2 · answered by cyswxman 7 · 0 0

i think its because in the winter the axis is further from the sun (hince the colder weather) and in the summer it is tilted more towards the sun. The tilt (23 degrees) is what creates our seasons.

2007-12-26 01:26:48 · answer #3 · answered by melanie b 2 · 1 0

The sun's path is higher in the sky in summer, so it rises further to the east and sets further in the west. In short, the path it takes across the sky is longer in summer.

2007-12-26 01:35:40 · answer #4 · answered by Bumblebee 4 · 0 0

Bcoz , the sun changes his direction. you can note these changes.
in summer - the sun will top on you head at 12.00 noon but in winter it little change.

2007-12-26 05:33:03 · answer #5 · answered by Rohan 2 · 0 0

melanie b is exactly right. google goddard space photo of the day if interested in astronomy. they post photos everyday with descriptions.

2007-12-26 01:58:06 · answer #6 · answered by justjake22 1 · 0 0

earths' axis

2007-12-26 03:10:42 · answer #7 · answered by Anonymous · 0 0

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