Does it have to do with the earth's tilt towards the sun? Please provide as many details as possible.
210516
Check out the wikipedia site...
184390
You may be referring to the Coriolis Effect, which governs the rotation of very large fluids (like weather systems on earth), due to differential forces caused by the rotation of the Earth.  In a relatively small object like a pipe (or yes, even a toilet) the direction of rotation is either random or determined by the geometry of the object.
79799
The Earth’s rotation axis is not perpendicular to the plane in which it orbits the Sun. It's offset by 23.5 degrees. This tilt, or obliquity, explains why we have seasons and why places above the Arctic Circle have 24-hour darkness in winter and constant sunlight in the summer.\n\nBut the angle is not constant – it is currently decreasing from a maximum of 24 degrees towards a minimum of 22.5 degrees. This variation goes in a 40,000-year cycle.
386326
Even if the earth wasn't tilted at all, it would still be colder at the poles and hotter at the equator.  Imagine that you want to find a place to lay down solar power panels on the ground.  You'll get more solar energy if you picked a spot at the equator than at the poles, because one gets the maximum solar energy influx when the sun is directly overhead, and minimum when it's at the horizon.  Having the earth tilted merely exaggerates this effect, and causes seasonal changes in solar influx for different parts of the world, but is not the primary cause of "too cold" and "too hot" being in some places.  The primary cause is that the earth is round, so that some places just get more solar energy than others.
75785
If the earth wasnt tilted on its axis, we probably wouldnt have any gravity.  The tilt helps with the gravitational pull of everything and the moon itself.
425298
This phenomenon is caused by observing the earth/sun/moon system from within the system itself i.e. from the earth's surface. If one were to take a spaceship and travel far from earth and look back it the moon it would be obvious that its lit side always pointed directly at the sun, as one would think. It would be easy to see this as one could be assured that all the lines-of-sight were straight lines.\n\nFrom almost any viewpoint on the earth's surface, however, the sun appears to cross the sky in an arc. This is simply a consequence of living on a sphere: even if the earth's axis was not tilted, any point not at the equator will see the sun rise in the east and set in the west but because it would not pass directly overhead (it would only reach an altitude determined by the latitude of the observer) its path between east and west must be an arc. The same would be true for the moon, and the consequence of the sun and moon being constrained to cross the sky in an arc as opposed to a straight line is that, as the asker states, if you observe them at the same time the lit part of the moon will not appear to be pointing at the sun - you will tend to forget that the line-of-sight between them is actually curved as seen from the earth. However, if you took a photo of the sun setting and then one of the moon when it was about to set and compared them you would see that the lit part of the moon was indeed pointing to where the sun had set earlier: this is a valid comparison because they would both be on the same part of the arc. A similar effect is also very noticeable when the moon is a crescent - when it rises the "horns" of the crescent are pointing downwards, when it reaches maximum altitude they are pointing directly sideways and when it sets they are pointing upwards.\n\nThe fact that the earth's axis is indeed tilted does not affect the basic argument above, just complicates it a little because now even at the equator the path of the sun & moon will usually be an arc: it is only a straight line [overhead] at the equinoxes (and is so at one of the tropics on each solstice).\n\nThe slight tilt between the orbit of the moon and that of the earth is not the cause of this problem, as some answerers have stated, nor is the tilt of the earth's axis: these only affect the exact position of the moon in the sky relative to the sun i.e. which arc it traverses. Whether in a higher or lower arc, the moon will still appear to rotate as it crosses the sky in order to maintain its orientation relative to the sun and will still point directly at the sunset postion upon "moonset".
262313
It is due to the earth's orbit around the sun. At night, we are looking in different directions over the course of a year. The stars stay in the same positions over long periods of time.
626399
The sun isn't moving.\nThe sun appears to move east to west because Earth is rotating on its axis (actually, the earth is rotating on its axis, as well as rotating around the sun)
64002
Because it has been darkest for longest at this time. Why is the high at around 6:00 pm? same reason. The sun has been at its peak for longest then.
582532
it has to do with the depth of the ocean and how the sun is hitting it
340796
it seems to rise in the east and set in the west, but it is really the rotation of the earth, so the sun isnt really rising or setting at all
590565
I've read about the angle of incidence answer in many elementary school books. At best, it is misleading. The fact that sunlight is more direct during the summer has little to do with the amount of radiation a hemisphere of the Earth collects. The Earth's tilt does however dictate how many hours of sunlight a hemisphere receives. In the northern hemisphere when the Earth is tilted toward the Sun (June, July, August) the north gets more hours of sunlight. More hours of sunlight equates with more collected radiation and that equates with hotter temperatures. Having said that, this isn't the entire story. If it were then the North Pole would be the hottest place on Earth during June, July, and August... and it isn't. So weather patterns play an important role in moving the heat to specific places.
316941
Precession! The shape of Earth’s orbit becomes more or less oval (eccentricity), Earth wobbles as it spins (precession), and Earth's axis changes too (tilt). All these changes, over thousands of years, causes Earth's climate to change.
28522
the earth was at a stable orbit.  no  tilt or axis to cause differences in the seasons the earths temperature was just about uniform at 72 deg F.  the earth was at that tome also protected by the vapor barrier basically A thin shield of ice in the uper atmosphere that served 2 purposes it blocked out the harmful ultra violet radiation from the sun  and it increased the atmosphereic pressure to 2 atmospheres.\n\nthis caused things to live a lot longer and grow a lot bigger.  plants for one thing.  there is more coal on the earth right now then there are plants to produce it.  meaning if you were to take all the plants on earth right now and turn them into coal the pile of coal that you could make would be less than that currently available in the ground not including what has already been taken out.\n\nplanys grew much taller in this environment and so did reptiles lets take the crocodile.  a croc now a days can live about 100 years.  reptiles throughout thier life never stop growing.  so now you have an animal that in 100 years can grow to be about 15 feet long but instead you give it 900 years to grow.....presto you have a dinosaur.  \nthen a few thousand years ago an ice meteor crashed through the vapor barrier hitting the earth. this caused the barier to colapse and as it fell it began to melt and other various things and the world was covered in a great flood.  the earth finally settled back out into a somewhat normal rotation (you ever seen what happens to a gyroscope when you bump it)\n\nnow the earth has a 27.3? or is it 23.7 deg tilt to its rotation that causes us to have 4 seasons and tropics temperate zones and artic zones.\n\nBTW the earth is between 6000 and 10000 years old SCIENCE CAN PROVE IT.  if you want to know how just ask me.  i'll try to explane it as best as i can or you can wisit this website.  and do some reading\n\nall the SCIENCE is right there.
510342
The Earth is tilted at an angle of about twenty three and a half degrees.  This is the reason why North and Magnetic poles are not at the same place.  \n\nAnyway, in the Northern winter, the North Pole is angled away from the Sun, with the South Pole therefore being angled towards the Sun.  The result is 24 hours night in the north, 24 hours day light in the south.  This is the southern summer.\nNow remember that the Earth maintains this angle throughout its orbit.\nSix months later, the Earth is on the other side of its orbit around the Sun.  Still maintaining the same tilt, now the North Pole is receiving 24 hour day light, and the South Pole is in darkness.  Northern summer, southern winter.\n\nThe Arctic and Antarctic circles mark the limit of this 24 hour daylight, and the Tropic of Cancer (North) and the Tropic of Capricorn (South) mark the limits of the maximum travel of the Sun at it appears in the northern and southern skies.\n\nAt the Spring and Autumn exquinox, the Earth is such that the Poles are receiving equal amounts of sunlight.  Equinox means "equal night".  \n\nI down know any particular websites but try the NOAA and BBC weather sites.\n\nADDITION: To Glenn Blaylock.  Thank you very much for the correction.  I'll read up on my error.
60174
If I understand your question, Earth's velocity around the Sun changes as its distance from the Sun changes; we are farthest from the Sun during summer (northern hemisphere "summer")and our orbital velocity is at its lowest. When our orbit takes us in closer to the Sun in winter, our velocity increases. Kepler determined the principles behind this relationship hundreds of years ago.
210177
Earth revolves around the sun because the giant nebula out of which the solar system formed was spinning and the angular momentum is conserved, and earth spins because of the initial config. Why it revolves in an ellipse, see this\nexplanation at http://www.mathsnet.net/cabri/feynman.html