Earth In Space

How Earth Moves EARTH MOVES THROUGH SPACE IN TWO MAJOR WAYS. ROTATION REVOLUTION

How Earth Moves Axis- the imaginary line that passes through earth’s center and from North Pole to South Pole Rotation- The spinning of the Earth

How Earth Moves Earths rotation is what causes day and night It takes about 24 hours to rotate once Earth rotates in a COUNTER CLOCKWISE direction

How Earth Moves Revolution- The movement of one object around another One complete revolution around the sun is called a year Orbit- The path the earth follows around the sun

How Earth Moves THE EARTHS PATH IS NOT QUITE CIRCULAR, IT IS A SLIGHTLY ELONGATED CIRCLE CALLED AN ELLIPSE

The Seasons on Earth Most places outside of the tropics and polar regions have four seasons Winter Spring Summer Autumn

The Seasons on Earth Sunlight hits the earth most directly near the equator It hits the poles at a very steep angle

The Seasons on Earth The earth has seasons because its axis is tilted as it revolves around the sun Earths axis is always tilted at 23.5° from the verticle

The Seasons on Earth Summer and winter are caused by earths tilt as it revolves around the sun Fun Fact the earth is farthest from the sun in the summer in the northern hemisphere

The Seasons on Earth Earth in June The days In the Northern Hemisphere are longer and sun is high in the sky (summer) Days in the Southern hemisphere are shorter and the sun appears lower in the sky. (winter)

The Seasons on Earth In December the Southern Hemisphere is Summer, the Northern Hemisphere is winter

The Seasons on Earth Solstice. When the sun is farthest from the equator twice a year Summer Solstice Winter Solstice

The Seasons on Earth http://www.youtube.com/watch?v=lIxRFvDOVIg 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 night March 21--- spring (vernal) September 22--- fall (autumnal) http://www.youtube.com/watch?v=lIxRFvDOVIg