1. Aim#13: How do the 9/28/11 planets move around in space? Do Now: In Notebook: 1.)Describe Revolution and give one example 2.) Describe Rotation and give one example HW: Measuring Up pg. 185-186

2. 1.What determines how old you are? 2.What about LEAP YEAR? 1 year = 365 ¼ days The planet’s orbit around the sun Happy Birthday!!

3. How old would you be on Mercury? Mercury moves around the Sun about every 88 days. How old will that make you on Mercury? 4748 days/88 = 54 Mercury Years Old 13 years x 365 ¼ = 4748 days

4. The Sun and Constellations Why are there different constellations in the night sky at different times of the year? Why does the sun appear to move around the earth from dawn till dusk?

5. United Streaming Video: Rotation and Revolution 1.How did early peoples’ view of the sun’s movement differ from what we know today? 2.What is a day? How do day and night compare for a planet? 3.In terms of planetary movement, how does a day and year differ? http://player.discoveryeducation.com/index.cfm?guidAssetId=D621326A- 36AB-47BF-9CC7-77BE8EB7589A&blnFromSearch=1&productcode=US

6. Rotation 1 full rotation = 1 DAY or 24 hours Causes days and nights.

7. Earth’s Rotation Sun rises in EAST and sets in the WEST

8. Revolution = Orbit Travels around the Sun in an Elliptical (oval) pattern. Revolution

9. What does a revolution cause? A year -Earth’s revolution is 365 ¼ days The Seasons – different sides of the Earth face the sun at different times of the year.

10. 1.What is the Center of the Solar System? 2.What kind of movement causes day and night on each planet? 3.What kind of movement is shown by the lines in these pictures (A and B)? 4.Venus’s year is shorter than its day. What does this mean about its rotation and revolution? Summary A. B.