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# Night and Day

This is our Prezi about night and day.
by

## Emily DUQUE

on 28 February 2013

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#### Transcript of Night and Day

By: Emily, Tanya, Carlos A, and Juan Felipe Night and Day How Earth moves Rotation Revolution Day & Night related to Seasons Gravity Equal Time Did you know? Earth is rotating on its axis and also moves arond the Sun Rotation is the spinning of Earth on its axis
The imaginary line that passes through Earth's center and the North and South poles is called an axis
It takes 24 hours for the Earth to rotate once
The sunlight cant reach the side of the Earth that is not facing the Sun so it is night
The Earth spins from west to east, that's why the Sun rises in the east and sets in the west In addition to rotating on its axis, Earth travels around the Sun
Revolution is the movement of one object around another
The Earth revolves around the Sun
One complete revolution is called a year.
Earth follows a path as it revolves around the Sun, which is an orbit
Earth's orbit is a slightly elongated oval or ellipse Gravity causes the Earth to move around the Sun
It is in an invisible force, that is not completely understood by science
This also keeps the Moon rotating around the Earth
It also makes things to fall to the ground
The Earth is always being pulled towards the Sun by gravity. If the Earth were stationary compared to the Sun, it would fall into the sun under the force of gravity. The length of the day and night varies in each season. For instance, the daylight is longer in summer and the night is shorter. In winter, the nights are longer and the days are short. It is the length of the day and night that determine the temperature of the seasons and not the revolution of the Earth. Now, if only the Earth’s axis was perpendicular to its orbital plane, all places on Earth would experience equal times of days and nights, i.e., 12 hours of day and 12 hours of night. However, this is not so.
at certain times of the year, those in the northern hemisphere will be exposed to the Sun longer than those in the southern hemisphere. Then as the Earth approaches the opposite side of its orbit, the opposite happens and those in the southern hemisphere will now have more hours under the Sun.
Subsequently, in extreme places like the North and South pole, the Sun may never set or never rise at certain times of the year. The Earth revolves around the Sun at a speed of 65,000 mph, that's 30 kilometers a second Earth moves trough space in two major ways:
Rotation & Revolution The Earth roates at a speed of 1,000 mph The stars and the Moon are still there during the day, but the Sun's light is brighter and the stars and Moon fade
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