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Clearly, when you see the Sun shining in the sky, it is day, and when you don't it is night. So the real question is "why is the Sun in the sky at some times and not at others?" We can see that the Sun seems to move across the sky starting in the east in the morning, moving toward the south at noon, and then toward the west as the day ends. How does this happen?
Long ago, people believed many weird things about the Sun and how it traveled across the sky. The ancient Greeks believed that the Sun rode across the sky in a chariot drawn by four white horses driven by the god Heleius! These days, we know that the Sun appears to move across the sky because the Earth rotates on its axis.
So how does the turning of the Earth lead to the Sun's motion across the sky? It is easy to see this if you shine a bright light on the side of a globe in a darkened room. Find where you live on the globe. Now slowly spin the globe on its axis so that if you look down on the north pole, it is rotating counterclockwise. Watch what happens to the place where you live. Do you see that it is sometimes pointed toward the light (which represents the Sun) and sometimes away from the light? Hey, you've made day and night!
When where you are is pointed toward the Sun, it is day. Then the Earth rotates you away from the Sun, and it is night.
So, how fast does the Earth have to rotate in order to make one complete spin in 24 hours? At the equator, the Earth is rotating at a speed of about about 2200 kilometers per hour. Good thing we human beings can't feel this motion!
What else can I help you with?
How day and night manifest?
it is day when it is light and it is night when it is dark
Are eels awake in the day?
Yes eels camouflage themselves at night
Is a swan a day or night bird?
A day bird because you do not see a swan at night time but you do see them in groups or by themselves in the morning or afternoon.
What are the manifestation of the movements of the Earth?
The Earth moves in a number of ways. It revolves around the sun, which manifests itself as the seasons of the year. It rotates on its axis, which mainfests itself as the cycle of night and day. It has tectonic plate movements which manifest themselves as earthquakes. Mountains rise and fall (very slowly).
Is it possible that a night of drinking could cause such severe dehydration as to manifest a fever the following day?
I have never heard of dehydration manifesting itself as a fever.
In what ways do spirits manifest themselves?
Spirits can manifest themselves in various ways, such as through apparitions, sounds, smells, or physical sensations. They may also communicate through dreams, visions, or feelings of presence.
What is one adaptation of a starfish?
they hide themselves during the day and come out at night so predators do not see them
Is the hyena active duirng the day or at night?
Hyenas are most active at night, because it's easier for the to scavenge without being preyed on themselves
Did the Boston tea party happen at night or day?
The Boston Massacre happened at night on March 5, 1770.
Can ghosts ingest or absorb electricity in order to manifest themselves?
Ask one
How do people of the northwest region use blankets and copper shields?
to keep warm day and night and to protect themselves
Why did The Saturdays call themselves The Saturdays?
Rochelle (from The Saturdays) once explained that they called themselves The Saturdays because it's everyone's favourite day, and it is always the best night out.
