Rotation and Orbit of the Earth What determines

Rotation and Orbit of the Earth /

What determines the length of a day?

Rotate � The spinning of a Planet on its axis is called a rotation � Earth rotates on its axis at about 1668 km/hour. � A person can rotate by standing in one place and turning around. � Picture

Rotating �Earth spinning on it’s axis gives us day and night

Day vs. Night �Only one half of the Earth faces the sun at any given time �When Earth is facing the sun, it is daytime, when Earth is facing away from the sun, it is night time � Picture

Full rotation �Earth completes one rotation on its axis in 24 hours, or one day

What determines the length of a year?

Rotate and Revolve �As Earth rotates on its axis, it also revolves or orbits around the sun

Orbit/Revolve �Go around something else �Satellites, the space shuttle, space stations, and the Moon all orbit (go around) the Earth. �The earth and all the other planets revolve around the sun. �Caused by the gravitational pull of another object

Revolution and Orbit �Earth makes an orbit around the sun. �Every 365. 25 days (12 months or one year) earth makes a full revolution (or full orbit) around the sun. � Picture

Rotate and Orbit �http: //sciencenetlinks. com/interactives/messenger/or /Orbit. Rotation. html

The Tilt of the Earth’s Axis

Earth’s Axis �The earth is titled on its axis at 23. 5° and it is always pointing in the same direction � Pictures

�The Earth experiences longer periods of day light when facing the sun

Seasons �The Earth’s tilt and the orbiting of the Earth around the Sun causes the seasons.

�When the North Pole is tilted toward the sun, the sun’s rays strike the Northern Hemisphere MORE directly, and this region is warmer �When the South Pole is tilted toward the sun, the sun’s rays strike the Southern Hemisphere LESS directly, and this region is colder �https: //www. youtube. com/watch? v=9 n 04 SEzuv. Xo

Equator and the Poles �Near the equator sun rays hit Earth’s surface MORE directly, so temperatures are warmer there �Near the poles, the sun rays hit the Earth’s surface LESS directly, so the temperatures are colder there

Hours of Light and Darkness �At Equator = 12 hours of day light �Toward sun = more than 12 hours of day light �Away from sun = less than 12 hours of day light � Picture

�Mr. Parr: Earth orbit: https: //www. youtube. com/watch? v=YONrbl 6 x. LIM �Space Rap: http: //www. flocabulary. com/solar-system