2006-11-21 06:03:27 · 17 answers · asked by mikeal108 1 in Science & Mathematics ➔ Geography
because the earth tilts as it rotates on its axis.
2006-11-21 06:04:55 · answer #1 · answered by Alfred E. Newman 6 · 1⤊ 0⤋
The Earth's axis is tilted 23 and a half degree from vertical.
The Earth spins around this axis approximately once every 24 hours giving us the sidereal day (Day + Night).
The Earth is also moving round the Sun so in Summer (JUNE, JULY & AUGUST in the UK) we are closer to the Sun. When we are on the OPPOSITE part of the orbit (DECEMBER, JANUARY & FEBRUARY) we are further from the Sun so less solar radiation reaches us.
The equatorial areas have little seasonal change as they are a fairly constant distance from the SUN. They also have almost equal lengths of day and night! This only happens in higher lattitudes at the EQUINOXES (which means equal night )compare to the day period.
Hope this helps
2006-11-21 15:41:24 · answer #2 · answered by beech7wood2000 3 · 0⤊ 0⤋
Earth orbits the sun elliptically and, at the same time, spins on an axis that is tilted relative to its plane of orbit. This means that different hemispheres are exposed to different amounts of sunlight throughout the year. Because the sun is our source of light, energy and heat, the changing intensity and concentration of its rays give rise to the seasons of winter, spring, summer and fall.
2006-11-21 14:13:31 · answer #3 · answered by jessie 3 · 0⤊ 0⤋
The seasons are a result of the Earth's axial tilt. In Summer, the northern hemisphere of the Earth is tilted towards the Sun, in Winter, it's away from the Sun. We are actually closer to the Sun in Winter (just over 91 million miles) than we are in Summer (94 million miles). The tilt means that the north gets more sunlight in summer and less in winter. That's why southern hemisphere summers are hotter than northern hemisphere ones. In southern summer (northern winter) we are closer to the Sun, and the southern hemisphere is tilted towards the Sun. We are at our closest point to the Sun (perihelion) on 4th January.
2006-11-22 04:56:37 · answer #4 · answered by Stratioticus 1 · 0⤊ 0⤋
the earth's axis of rotation is tilted 23 degrees from perpendicular relative to the sun. Combining this tilt with the elliptical orbit of our planet gives us our seasons.
2006-11-21 23:19:59 · answer #5 · answered by Frank M 2 · 0⤊ 0⤋
because the earth rotates on a 23 1/2 degree axis.
2006-11-21 20:16:29 · answer #6 · answered by G Dogg 3 · 0⤊ 0⤋
It has to do with the rotation and the tilting of the earth on its axis.
As we travel away from the sun, it becomes colder and closer to the sun makes it warmer.
This is why it's summer time in Australia right now.
2006-11-21 14:08:26 · answer #7 · answered by ~CountryGirl~ 2 · 0⤊ 0⤋
the earth pivots as it rotates around the sun, which causes the seasons
2006-11-23 07:09:05 · answer #8 · answered by internat y 3 · 0⤊ 0⤋
coz the earth is revolving around the sun in an elliptical orbit while rotating on its axis.
2006-11-21 14:06:56 · answer #9 · answered by Weirdy 1 · 0⤊ 0⤋
Because the earth rotates on its axis.
2006-11-21 18:22:16 · answer #10 · answered by DAndra B 1 · 0⤊ 0⤋
why do we have night and day?. becuase the sun rises and set. why do we have seasons? becuase the sun get further and closer to earth as it rotates elliptical orbit
2006-11-21 14:07:52 · answer #11 · answered by Abbas 3 · 0⤊ 1⤋