Earths motion

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Earths motion
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Earths motion
Rotation
Revolution
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Rotation
Cause
Result
Gravity Contraction during formation
Day night Time zone
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Revolution
Cause
Result
Gravity btw Sun and Earth
Season Change in constellation
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Rotation

• Earth spins on its axis
• The axis is tilted at 23.5
• Earth rotates 360/24hrs
• Earth rotates 15/hr

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Rotation

• Proved by
• Foucault pendulum
• Coriolis force

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Foucault pendulum

• Jean Foucault
• Pendulum suspended top
• of the ceiling
• The pendulum appears to turn very slowly
• Indicates that the Earth is rotating

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Coriolis Force

• A rotation force that deflects ones path
• North Hemisphere deflects to the right
• South Hemisphere deflects to the left

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Geocentric and Heliocentric

• Earth is in the middle of the solar system
• Sun is in the middle of the solar system

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Review

• Which theory states that the sun is in the middle
  and revolves around the sun?
• What are the two evidences for Earths rotation?

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• What are the result of Earths
• rotation?
• Revolution?

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• Earth is tilted how many degrees?
• What is the rate of Earths motion?