what makes the earth till on its axes?
441367
Well, it doesn't keep tilting -- it remains pretty much at 23 degrees.  Scientists haven't quite made up their minds yet as to exactly how the solar system formed, and especially the Earth; but most agree that it started out as a huge cloud of dust and gas.  Over billions of years, gravity made this cloud start to condense into spinning lumps.\n\nProbably the lump that became the earth just happened to be spinning around an axis of 23 degrees, and it kept that position as the earth solidified and cooled.\n\nWhat makes the changes in the seasons is not that the earth moves closer to the sun, but because the rays of the sun hit the earth at a slant.  Again, the axis doesn't change, it keeps pointing the same way with respect to the stars.  But as the earth goes around the sun, the north pole first is facing in the direction of the sun (summer); then 6 months later the earth is at the other side of its orbit, and the north pole is pointing away (winter).  Because of this (if you get a globe and a lamp, you can see how this works), during winter more of the north half (called the hemisphere) is in nighttime, and from where you're standing the sun seems lower in the sky, and the days are shorter.  During this time, though, the south pole is pointing towards the sun, and the south half of the earth (the southern hemisphere) gets more sun, and for them it's actually summer.  In Australia, Christmas is in the middle of summer!\n\nNow, actually I just lied a little bit.  The earth's axis DOES change over time.  If you've ever played with a spinning top, you'll notice that the top wobbles slowly, its axis of spin going around in a little circle.  Scientists call this "precession," and the earth does the same thing.  The axis of the earth wobbles around in a circle that takes about 23 thousand years to complete.  Right now, the north pole points almost straight at the star Polaris (the "North Star"), but after a while -- a very long while -- the north pole will start to point elsewhere in the sky.  230 centuries from now, the axis will have made a full circle and will be pointing at Polaris again.
617247
Hint: The Earth revolves 7.5 degrees every 30 minutes.
1184111
hey buddy! hello.\nwe all know that the earth rotates around the sun and also on its own axis. we also know that an imaginary line divides the earth into 2 equal halves. this line is the equator. the upper part is the north side and the lower is the south side. the axis of the earth does not run perpendicularly, but is tilted at an angle of about 16 degrees (if i remember it correctly)\n\nnow, as the earth rotates simultaneously on its axis and around the sun, it so happens that sun rays fall on one side that is either on north or on south side for continuous 6 months. this means that there is day for continuous 6 onths on one side and night on the other. so, it totaly depends that at what time of a year you r comparing both the poles temperature. if you compare the temperature of the 2 sides in the month of june, north pole will be hotter and south pole will be cooler. opposite happens during december and january. \nat a certain time it may also happen that temperatures of both the poles are same! this may happen at the time of transit. that is when sunshine is equal to both the poles!\n\nhope i have answered u.\n\ngood luck.
596684
The correct option is 'rotation of the earth'. When earth revolves, some part of it is directly facing the sun, and the other part is not. That explains the presence of day in one part of the world, and night in the other.
9991
To a first-order approximation the Earth is round.  This\nis due to gravity.  Gravity pulls with equal strength in all\ndirections; therefore any variations from a spherical\nshape will lead to gravitational forces that\nbring the shape back into that of a sphere.\n \nThis is without considering the rotation of the earth,\nhowever.  The rotation of the earth adds centrifugal\neffects, which cause the earth to bulge slightly at\nits equator and flatten slightly at its poles.\n(This is like twirling a rock on the end of a string\nand then letting go--the rock flies away from the\ntwirler.)  Because of these centrifugal effects, the\ndistance from the center of the earth to the surface\nof the earth is about 0.33% shorter at the poles\ncompared to the equator.
170291
The earth goes around the sun.  As it does, it is at a certain angle, it's not like straight up and down. You're either tilted away from the sun or toward the sun.  If you are tilted away, it's winter, if you're tilted toward the sun, it's summer.  If it's in between, it's fall or spring.
659353
The Earth rotates counter-clockwise when viewed from above the North Pole. \n\nThe rotation causes a centrifugal force, which causes the bulge of the equator, and a coriolis force, which is important in determining the flow of jet streams in the atmosphere and currents in the ocean.
98842
They are many theories on what causes ice ages, many of which are contraversial.  Some of the causes are astronomical in nature, others concern themselve only with earthbound events.\n\nHere are some of the astronomical factors thought to contribute to ice ages:\n\nSolar output\n\nThe sun's output varies slightly, in a 11 year cycle.  Longer cycles, with greater variation in output, probably contribute to ice ages.\n\nOrbital eccentricities\n\nThe earth's orbit has a 400,000 year cycle, where it moves from nearly circular to a more oval shape, and back.  A more oval shape makes for more radical seasonal climate change.\n\nAxial tilt\n\nThe earth's axis varies from 22.1 to 24.5 degree on a 40,000 year cycle.  The greater the axial tilt, the hotter the summers and the colder the winters.\n\nAxial orientation\n\nThe direction the earth's axis points varies according to a 25,800 year circle.  If the axial tilt points towards the sun during earth's closest approach, and away during its furthest approach, one hemisphere will have warmer summers and cooler winters than the other.  This is what the southern hemisphere currently experiences.\n\nOrbital inclination\n\nThe tilt of the earth's orbit around the sun increases and decreases in a 100,000 year cycle.  When highly tilted, there is less dust and debris between the earth and sun, resulting in more solar radiation reaching the earth.\n\nScientists are not sure which, if any, of these factors have the most influence on ice ages.
303384
The answer to your question is found in one fact: the earth's axis is inclined. If you imagine the earth's revolution about the sun as occuring on a huge flat disk, with the sun at the center of the disk and the earth at the rim, the axis is not perpendicular to the disk, but inclined from the perpendicular. The northern end of the axis, which sticks out of the earth at the north pole, always points to the same place in the sky as the earth goes about the sun. (Of course, the southern end of the axis always points to its own place in the sky, also.)\n\nYou can see from this that some of the time the northern end of the axis is tilted away from the sun (at the times that the southern end is tilted toward the sun) and some of the time the northern end of the axis is tilted toward the sun (when the southern end is tilted away). The northern end is most tilted away, and the southern end most tilted toward, on December 21. The northern end is most tilted toward the sun, and the southern end most tilted away, on June 21. That is why winter begins in the northern hemisphere and summer begins in the southern hemisphere on December 21. Summer begins in the northern hemisphere and winter begins in the southern hemisphere on June 21.\n\nAt other times the axis is internediary between most tilted toward and most tilted away.
754835
The axis of earth is tilted 23.45 degree from the ecliptic; and the orbit of the earth around the sun is not a perfect circle (it is an ellipse, and thus the distance from earth to the sun changes over the course of a year)
880804
You have it! The Earth is tilted 23 degrees over relative to its orbit of the Sun. This spinning makes first the North Pole, and then the South Pole point towards the sun 6 months later. To our eyes, the Sun seems to rise and set in different spot each day. It is our point of view, together with the current location of Earth in its orbit.\n\n;-D Yes. This is what causes the seasons.
314905
Imagine a molten ball of liquid rock in space. It will take the shape of a sphere due to the gravitational pull - any other shape would be turned into a sphere by gravity over time. \n\nNow, set this sphere rotating. Due to centrifugal forces, the sphere will bulge slighty round its equator. There you have it, the shape of the Earth.
350355
Earth is an oblate spheroid, resembling a sphere flattened at the poles.\n\nThe volume of an oblate spheroid is\n\n    V = 4/3 X 3.14 X a^2 X b\n\nwhere π is the mathematical constant pi, and a and b are the equatorial and polar radii.\n\nSubstituting a = 6,378,135 m and b = 6,356,750 m\n\nThe Huge EarthThe mean radius of the earth is approximately 6.4 million meters (exact = 6.37 x 106 m). Its volume is then:\n\n(4/3) x 3.14 x 64000003 m3\n\nThis comes to 1,097,509,500,000,000,000,000 cubic meters.
370797
The Sun.\n\nEDIT: Yes, what other people have said about the Earth's tilt and whatnot are true in that they affect the atmosphere, but you asked for the source of energy. That is solely the Sun.
340001
The earth turns with respect to the motion of force which was placed upon it with in the vacuum of space, and also with respect to the vacuum of space there is no friction to slow it down, therefor it shall continue to spin forever if it's motion is uninterrupted, or unaltered by another matter energy object of aether large size, or fast speed impacting it with direct respect to the angle of the interaction.\n\nas for your second question the axis is the center point at which the spin turns, and is therefore recognized by us with respect to the earths motion spin as the axis, and if the motion and direction of spin were changed tomorrow to be perpendicular of that which it is today, then the new axis would be perceived tomorrow as existing at some point at which we recognize the equator today.
64853
First of all the world is not round it is an oblique sphereoid (basically a double ended pear shape.)\n\nThe force of gravity generated by the molten core of the planet acts in all directions equally at any one point in the planet.  This attracted the material from space that formed earth following the Big Bang.  This would form a spherical object.\n\nThe rotation of the planet complicates thia as the equator is rotating faster than parts of the Earth that are further away from the equator, the poles rotate the slowest.  This disparity causes greater centripidal forces to be experienced at the equator than at the poles so the earth bulges out at the centre.
132668
The angle earth makes with its axis causes seasons. The distance between earth and sun is not effective on seasons, because in summer months the earth is farther from sun, and in winters it gets closer.