Earth's Rotation

• Proof of Earth's rotation includes the Foucault Pendulum and the Coriolis Effect.

Coriolis Effect

• The bending of fluids, like air and water, is referred to as the Coriolis Effect and is due to Earth's rotation.

Results of Earth's Rotation

• Earth's rotation determines the length of the day.
• The direction of sunrise and sunset are effects of rotation.
• Rotation causes the change from daylight to nighttime.
• A day represents one complete spin of the Earth around its axis.
• The change from daylight to nighttime shows that the sun lights up only half of the Earth at any one time.
• The sun appears to rise in the east and then moves westward.
• Earth rotates counterclockwise, from west to east.
• The Earth rotates at a rate of 15 degrees per hour.
• The speed of Earth's rotation is greatest at the equator, because it has the most distance to cover in one rotation.
• Solar noon occurs when the sun is at its highest position in the sky for a particular location.
• A city's solar noon depends on its latitude.
• Standard time zones use the prime meridian as their starting point.
• As you move east of the prime meridian, time is later, and as you move west, time is earlier.

Proof of Earth's Revolution

• Evidences of Earth's revolution include parallax and the change in constellations with the seasons.

Parallax

• Parallax is the apparent shift in the position of an object when viewed from two different locations.