Eighth Grade Earth and Space Science
Model and illustrate how the tilted Earth rotates on its axis, causing day and night, and revolves around the Sun causing changes in seasons.
Velocity of Earth’s Rotation
The Earth is in constant motion.
The Earth rotates (spins about its axis) once every 24 hours. It is this motion that causes daylight and nighttime.
Students can calculate the velocity of Earth’s rotation.
Math Enrichment: The velocity at different latitudes can be determined by this formula:
Velocity of Earth’s Revolution Around the Sun
velocity=107,300 km/h (67,062 miles per hour) counterclockwise (looking down on the North Pole)
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