Don’t Write What is in Green

Geocentric Model

Heliocentric Model

Proof for the Heliocentric Model  1851: Experimental proof of the motion of Earth is found  Two Proofs: Coriolis effect and Foucault pendulum  Coriolis effect: Winds blowing out of high-pressure system always curve to the right in the Northern Hemisphere

More Definitions  Year: Time required for a planet (Earth) to complete one orbit around its primary (the sun); days on Earth  Revolution: Orbital motion of a satellite around its primary  Foucault pendulum: Weight that is free to rotate as it swings back and forth; its slow change in direction of a swing is proof of Earth’s rotation

Review of Definitions  Axis: Imaginary line around which an object rotates  Rotation: Spinning of a body around an internal axis (The Earth’s rotation causes day and night)  Orbit: Path (usually an ellipse) of any satellite around its primary  Primary: Object around which a satellite moves

Exit Pass  In groups of 3-4…  In your own words, define Foucault Pendulum and the Coriolis Effect  State what they are evidence of.