Earth’s Rotation Definition
Earth's rotation is the spinning around its axis (center), causing day and night. For example, as Earth spins, parts face the sun (day) or away (night).
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Earth’s Orbit & Rotation
Fun Facts
- Earth rotates once every 24 hours, causing day and night.
- Shadows are longer in the afternoon than at noon due to Earth's rotation.
- Stars appear to move across the night sky because of Earth's rotation.
Why Do We Need To Know About Earth's Rotation
Understanding how Earth spins helps us know why we have time zones, which are important for working together worldwide. This is key for jobs in international business, moving goods around, and making computer programs that need to work in many places at once.
Also, the way Earth spins affects the what we see stars in the sky, which is important for astronomers. The rotation of the Earth led to the development of the earliest watches — sundials. A Foucault pendulum provides evidence that the Earth is rotating on its axis. Inventions throughout history are based on the study of space.
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