1. http://www.f-lohmueller.de/pov_tut/animate/im/planet_01ani.gif EARTH’S ROTATION AND REVOLUTION

2. Sunlight on Earth The diagram shows how Earth’s tilted axis affects the strength of sunlight in different places. EARTH’S SEASONS

3. Seasons The diagram shows how Earth moves during the year. EARTH’S SEASONS

4. SUMMER WINTER http://www.cyberphysics.co.uk/graphi cs/animations/Flash/LengthofDay.swf

5. EARTH’S SEASONS

6. 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? EARTH’S SEASONS Seasons Interactive Display

7. EARTH’S SEASONS

8. The Moon’s Motion MOON’S PHASES http://highered.mcgraw- hill.com/olcweb/cgi/pluginpop.cgi?it=swf::800::600::/sites/dl/free/007299181x/78778/Lunar_Nav.swf::Lunar%20Phases%20Interactive

9. Moon Phases As the moon orbits Earth, its sunlit side is seen from different angles. MOON’S PHASES

11. Solar Eclipse The diagram shows the moon’s penumbra and umbra during an eclipse. SOLAR ECLIPSES

12. Lunar Eclipse As the moon moves through Earth’s shadow, total and partial eclipses occur. LUNAR ECLIPSES

13. Tide Cycle Tides are caused mainly by differences in how much gravity from the moon and the sun pulls on different parts of Earth. Tides