1. Warm-Up (in your JOURNAL) 1.During which months do you think the following pictures were taken? (A)(B) 2.Where does almost all the heat on Earth come from? What specific type of heat transfer allows this heat to get to Earth? (conduction, convection, or radiation?) 3.If an object is closer to the sun, do you think it will have a higher or lower temperature?

2. OBJECTIVE SWBAT evaluate how planetary motion leads to season changes.

3. AGENDA Warm Up The Sun and the Seasons Video Revolution vs. Rotation? Demo Guided Practice Worksheet The Seasons Foldable Postcard Exit Ticket

4. QUOTE OF THE DAY “Nobody can go back and start a new beginning, but anyone can start today and make a new ending.” ~Maria Robinson

5. The planet…What do we know? All the planets in our solar system revolve around the sun. But how? Kepler discovered elliptical planetary orbits All the planets in our solar system revolve around the sun. But how? Kepler discovered elliptical planetary orbits B C A

6. Kepler’s Law Applied http://www.windows2universe.org/phys ical_science/physics/mechanics/orbit/o rbit_shape_interactive.htmlhttp://www.windows2universe.org/phys ical_science/physics/mechanics/orbit/o rbit_shape_interactive.html http://www.windows2universe.org/phys ical_science/physics/mechanics/orbit/o rbit_shape_interactive.htmlhttp://www.windows2universe.org/phys ical_science/physics/mechanics/orbit/o rbit_shape_interactive.html 6

7. VIDEO VIDEO (while watching, complete your video guide)

8. The Earth rotates on its axis 1 full rotation = one day Looking at the picture below, why is the left hemisphere experiencing a warm day and the right hemisphere experiencing a cooler night? DAY warmer NIGHT cooler Comparing Rotations: Earth=24 hrs Mercury=59 days Pluto=6 days

9. The Earth orbits (revolves around) the sun How long is one full revolution? 365 days = 1 year Comparing Revolutions: Earth=365.25 days Mercury=88 days Oluto=248 years

10. So this is what the Earth looks like right? axis

11. And it revolves around the sun like this right? This shows orbit

12. WRONG!

13. Earth’s axis is not straight –Earth’s axis is tilted 23.5 ° from vertical Earth’s axis is not straight –Earth’s axis is tilted 23.5 ° from vertical 13 23.5 ° tilt

14. The Earth’s orbit actually looks like this This shows orbit

15. 15 Like What? http://www.classzone.com/books/earth_science/terc/content/visualiza tions/es0408/es0408page01.cfm?chapter_no=visualization

16. LETS SEE THIS!! warmer cooler Projector= Sun Globe=Earth

17. Why does that matter?  The Earth’s tilted axis allows us to have seasons 4 seasons based on Earth’s position to the sun WinterSummerFallSpring

18. So what does this look like for us, in the Northern Hemisphere?? For each part of the demo, fill out your chart based on what is represented by each specific location: 1)tilt (towards/away) 2)Radiation (high/neutral/low) 3)Temperature (warm/moderate/cold) 4)Season

19. FAST FACT The star "Lucy" in constellation Centaurus is actually a huge cosmic diamond of 10 billion trillion trillion carats.

20. Tilt (towards/ neutral/away) Radiation (high/neutral/lo w) Temperatur e (warm/ moderate/ cool) Season

21. Winter When the Earth is tilted away from the sun. Coldest temperatures Top tilted away from sun= winter

22. Spring Moderate (medium) temperatures Starts cold and gets warmer as that part of Earth is tilted toward the sun Beginning to be tilted toward the sun= spring

23. Summer When the Earth is titled toward the sun. Warmest temperatures Top titled toward the sun= summer

24. Autumn (fall) Moderate (medium) temperatures Starts warm and gets cooler as that part of Earth is tilted away from the sun Beginning to be tilted away from the sun= spring

25. The equator divides the earth into top and bottom halves (Northern and Southern hemisphere) Because of the tilt of the earth, the hemispheres have opposite seasons. WHY?

26. 26

27. FOLDABLE 27 FRONT BACK INSIDE WINTERSPRINGAUTUMNSUMMER DRAWING DESCRIPTION DRAWING DESCRIPTION Draw a picture to show the Earth orbiting around the sun. Draw the Earth in the 4 main positions. Use arrows to show the direction the Earth is moving. On your arrows, describe what the temperature is doing. Label the four seasons. DESCRIPTION DRAWING DESCRIPTION DRAWING DESCRIPTION DRAWING

28. POSTCARD Pick a place on the map you will travel to over the summer. Write a postcard telling your friend what season it is there. Explain why it is that season. Describe what the temperature is like. For the picture on your postcard (on the back), draw what the Earth and sun would look like for this season. Pick a place on the map you will travel to over the summer. Write a postcard telling your friend what season it is there. Explain why it is that season. Describe what the temperature is like. For the picture on your postcard (on the back), draw what the Earth and sun would look like for this season. 28 1 2 3 4 1.Alaska 2.South Africa 3.Brazil 4.England 1.Alaska 2.South Africa 3.Brazil 4.England

29. EXIT SLIP HANDOUT!!!