English Deutsch Français Italiano Español Português 繁體中文 Bahasa Indonesia Tiếng Việt ภาษาไทย
All categories

7 answers

Sun and earth's rotation are the two factors.

As the earth rotates around the sun (365 days aproximately for a full orbit), it also spins on its own axis (24 hours per full rotation), thereby exposing one side of the earth at a time to the sun's rays (daytime) and the other side is blocked from the sun's rays (night time)

2006-08-24 06:06:10 · answer #1 · answered by JaneB 7 · 0 0

The main contributing factor that determines the formation of day and night is me, God. A long time ago, I said, "Let there be light", and there was, and I saw that it was good, but then I realized that you would be born into the future by my own determination, I couldn't help but perpetuate the joke, but then I lapsed into a very dark mood, and it became the obsidian manifestation of obscurity, called darkness, and it is your fault, so I am going to send you to hell for eternity. But there is KIt Kat there, so it is not all bad.

2006-08-24 06:12:41 · answer #2 · answered by John R 1 · 0 0

worldwide warming somewhat in line with how a lot of human beings there are that proceed to exist the earth and the fewer human beings there r the fewer worldwide warming will detroy the international britin could somewhat basically no longer enable human beings to have extra then 2 little ones then there inhabitants might stay the comparable that being suggested if some the place to try this it would take 50 years yet to come again in to result yet with ever becoming inhabitants u might desire to possibly basically calculate there emision in keeping with peron in keeping with 3 hundred and sixty 5 days to the quantity of engery use by using the solar to warmth the plant then u might desire to tell basically what u could be dealling with yet that being suggested if there the place substantial activities that did take place bring about international extensive death then worldwide warming might take place yet thats no longer gonna take place using fact up extra those with the flexibility to end that form of ingredient climate or no longer it became aproriate to do or no longer

2016-09-29 22:40:17 · answer #3 · answered by ? 4 · 0 0

Day and night formation? GOD! He made the sun and it was good. He made a lesser light to rule over the night (the moon) and it was good.

2006-08-24 06:14:44 · answer #4 · answered by memorris900 5 · 0 0

rotation of earth on its axis and position os sun r responsible foe the formation of day and nights

2006-08-24 08:02:32 · answer #5 · answered by vijay v 1 · 0 1

Why does Earth have day and night?

Day and night cycles are caused by Earth's spin on its axis. Earth turns or rotates one time every 24 hours. The part of Earth that is facing the Sun experiences day, and the part facing away from the Sun experiences night. As Earth spins counterclockwise (viewed from above the North Pole) the region of daylight moves across the globe from east to west.

Do other planets have day and night?

All the planets in the solar system spin on their axes (so does the Sun!) and so they have day and night cycles. There are differences, however, in the length of day and night. Some planets rotate faster than Earth and some rotate slower. Mars has a day/night cycle similar to Earth. Mars rotates on its axis once every 24.6 hours. Venus turns once on its axis every 243 Earth days (which is a little longer than it takes for Venus to go around the Sun!). The larger planets spin much faster. Jupiter rotates once every 10 hours, Saturn spins once every 11 hours, and Neptune completes a rotation in 16 hours. Pluto, at the farthest reaches of the solar system, spins on its axis once every 6.4 days.

Why does Earth's day length change during the year?

Every location on Earth experiences an average of 12 hours of light per day, but the actual number of hours of daylight on any particular day of the year varies from place to place. Locations around Earth's equator receive about 12 hours of light each day. In contrast, the North Pole receives 24 hours of daylight for a few months in the summer and total darkness for months in the winter. These two annual times of light and dark are separated by a long sunrise and a long sunset.

Earth rotates on its axis; this causes us to experience day and night. But Earth's axis is tilted 23.5 degrees (the angle is measured between Earth's equatorial plane and the plane in which it orbits the Sun). As Earth revolves around the Sun, the axis points toward the same location in space, almost directly toward Polaris, the North Star. This means that during our movement around their Sun each year, our polar regions spend long periods pointed toward the Sun in the summer (for example, July in the Northern Hemisphere, or December in the Southern Hemisphere) and long periods pointed away from the Sun during the winter. At latitudes greater than 66.5 degrees (90 degrees minus 23.5, the tilt of the axis), the regions above the Arctic and Antarctic circles on our globe, days of constant darkness or light can occur.

Because of this tilt and our movement around the Sun, there is a time when Earth's North Pole is tilting 23.5 degrees toward the Sun. This is the Summer Solstice, the first day of the Northern Hemisphere summer and the longest day of the year in the Northern Hemisphere. On December 21 or 22, our North Pole is tilting 23.5 degrees away from the Sun and the South Pole is tilted toward the Sun. This is the Winter Solstice, the shortest day of the year in the Northern Hemisphere. Twice each year, during the Equinoxes (“equal nights”), Earth's axis is not pointed toward the Sun. The Spring Equinox in March marks the beginning of the transition from 24 hours of darkness to 24 hours of daylight at the North Pole. The Fall Equinox in September marks the shift into 24 hours of darkness at the North Pole. During the Equinoxes, every location on Earth (excluding the extreme poles) experiences a 12-hour day time period.

Other planets also experience these changes in the length of day and night because they, too, are tilted on their axes. Each planet's axis is tilted at a different angle. Jupiter is tilted only 3 degrees, so its change in the lengyh of day and night as it moves around the Sun is less extreme than that of Earth. Neptune's axis is tilted 30 degrees; day and night changes would be more extreme on Neptune than on Earth. Uranus presents an interesting case because its axial tilt is even more extreme, 98 degrees! This means that the north pole of Uranus is pointed at the Sun during the north polar summer; the south pole is in total darkness. During the north pole winter, some 42 Earth years later, the south polar axis points at the Sun and the north polar region is in total darkness. During the spring and fall, when its axis is perpendicular to the incoming rays of the Sun, Uranus experiences a 17-hour day and night cycle as it spins on its axis.

2006-08-24 06:10:43 · answer #6 · answered by cascadingrainbows 4 · 0 0

rotation and revolution

2006-08-24 06:44:51 · answer #7 · answered by Monica 3 · 0 1

fedest.com, questions and answers