1. Earth In Space

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

3. 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

4. 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

5. 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

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

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

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

10. 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

11. 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

12. 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)

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

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

16. 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 spring (vernal)
September fall (autumnal)