1. Chapter 6 Less 2 Earth in Space
How does Earth move?
What causes the seasons?

2. KNOW THE DIFFERENCE
Rotation
Revolution

3. Rotation, One Full Day Spin, like a top East to West
Causes night and day

4. Rotation, One Full Day Earth's Rotation In which direction
does the Earth
rotate?

5. Revolution, One Full Year
Orbit
Elliptical
Gravity keeps the Earth in Orbit

6. What Causes the Seasons?
The tilt of earth’s axis causes the hemispheres to receive different amounts of the sun’s energy.
23.5 degree angle
The more concentrated the sunlight = warmer season

8. Solstices June 21st – Winter Solstice December 21st – Summer Solstice
Northern Hemisphere
Southern Hemisphere
June 21st – Summer Solstice
Longest day of the year
December 21st – Winter Solstice
Shortest day of the year
June 21st – Winter Solstice
Shortest day of the year
December 21st – Summer Solstice
Longest day of the year

9. Solstices and Equinoxes
The diagrams show the apparent path of the sun at the solstices and equinoxes in the Northern Hemisphere. What is the sun’s path at the equinoxes and the December solstice for the Southern Hemisphere?