Day and Night

The motion of the Earth relative to the sun causes Earth to experience cycles of day and night.

The Earth spins in a counterclockwise direction, meaning that if you are looking down on the Earth at the North pole, it rotates towards the right in a circle. The Earth completes one rotation in a 24 hour period. As the Earth rotates, it turns towards the sun and then away from it, causing day and night. When a side of the Earth is facing towards the sun, it is day on that side of the Earth. When it is facing away from the sun, it is night on that side of the Earth. When it is night on one side of the Earth, the areas on the opposite side of the Earth are in day.

Why does the Earth rotate? Complete this online activity. As the Earth turns.
Watch the Earth as it rotates in this Day and night video.
Ever wonder what other parts of the Earth have day or night when you do? Visit this map to see the regions of Earth that are in day and night right now! Earth View