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Earth In Space
How Earth MovesO EARTH MOVES
THROUGH SPACE IN TWO MAJOR WAYS. O ROTATIONO REVOLUTION
How Earth MovesO Axis- the
imaginary line that passes through earth’s center and from North Pole to South Pole
O Rotation- The spinning of the Earth
How Earth MovesO Earths rotation is
what causes day and night
O It takes about 24 hours to rotate once
O Earth rotates in a COUNTER CLOCKWISE direction
How Earth MovesO Revolution- The
movement of one object around another
O One complete revolution around the sun is called a year
O Orbit- The path the earth follows around the sun
How Earth MovesO THE EARTHS
PATH IS NOT QUITE CIRCULAR, IT IS A SLIGHTLY ELONGATED CIRCLE CALLED AN ELLIPSE
The Seasons on EarthO Most places outside of the tropics
and polar regions have four seasonsO WinterO SpringO Summer O Autumn
The Seasons on EarthO Sunlight hits the
earth most directly near the equator
O It hits the poles at a very steep angle
The Seasons on EarthO The earth has
seasons because its axis is tilted as it revolves around the sun
O Earths axis is always tilted at 23.5° from the verticle
The Seasons on EarthO Summer and winter
are caused by earths tilt as it revolves around the sun
O Fun Fact the earth is farthest from the sun in the summer in the northern hemisphere
The Seasons on EarthO Earth in June
O The days In the Northern Hemisphere are longer and sun is high in the sky (summer)
O Days in the Southern hemisphere are shorter and the sun appears lower in the sky. (winter)
The Seasons on Earth
O In December the Southern Hemisphere is Summer, the Northern Hemisphere is winter
The Seasons on EarthO Solstice. When the
sun is farthest from the equator twice a yearO Summer SolsticeO Winter Solstice
The Seasons on EarthO Equinox- twice a
year when the noon sun is directly over head at the equator. Means “equal night” 12 hrs of day and 12 hrs of nightO March 21--- spring
(vernal)O September 22---
fall (autumnal)
O http://www.youtube.com/watch?v=lIxRFvDOVIg
