Dimensions of the Earth: Vocabulary

1. Dimensions of the Earth: Vocabulary

2. Websites for Evidence of Earth being Round The Longest Day http://www.youtube.com/watch?v=PMoNSFmACWI Real Genius-Popcorn http://www.youtube.com/watch?v=r3uMeF4Wfy4&feature=related West Wing http://www.youtube.com/watch?v=-J1NHzQ1sgc http://www.youtube.com/watch?v=cGXp34c_o48&feature=related

3. 3 2 1 Proving That The Earth is Round What would the person see from the lighthouse? Directions: Explain how each statement/diagram or video clip offers some type of proof that the earth is round 3 1 2

4. 2. Lunar Eclipse Only a sphere can cast a shadow that appears round. During a lunar eclipse, the earth casts its shadow on the moon during the full moon phase.

6. Polaris Changes in Altitude – Polaris is a fixed point above the North Pole.

7. Altitude Demonstratorhttp://astro.unl.edu/classaction/animations/coordsmotion/altazimuth.html

8. Columbus Navigation //www.history.com/videos/columbus-uses-the-skies-to-survive#columbus-uses-the-skies-to-survive

9. Jeremy on His Bike • ://www.onr.navy.mil/focus/spacesciences/animation/observingsky/kid.swf

10. A.G.O What is the true Appearance of Earth Think Box Which diagram depicts the true shape of the Earth? Is the Earth Look Rough or Smooth from Space? Do you believe that a Globe is good model of the Earth?

11. “Roundness” is indicated by the ratio of the polar diameter to the equatorial diameter. Formula Round=PD/ED

12. Questions On Roundness Which of the Three Models was the best representation of a sphere? Using the roundness ration, which was more nearly a perfect sphere, the earth or the classroom globe? Which is longer the polar diameter or equatorial diameter? What does this do to the shape of the earth? If the earth did not measure out to a 1.0 on the roundness ratio, what do we call it? Lets say that your are walking through the super market produce area, what piece of fruit would resemble the earth’s roundness?

13. Problem Solving Activity Problem: How can the accurate location of a position on a surface be communicated between two people separated by a certain distance. Objective: Working together with another person, and having your chairs back to back. Your objective is to communicate to your partner exactly where the dot is that was placed in your circle by the teacher. Your job is to create system or method that will allow your partner to place a dot in his/her circle in the same position that the teachers has placed in yours.

14. Procedures:#1. Form teams of two and sit back to back with your chairs.#2. Each team will devise a method of locating the point on the circle and communicating to their partner where to place their dot in their circle. The two dots must match up exactly.#3. Teacher will give student A a dot in their circle and student B will have a blank circle.#4 Student A will have 3 minutes to communicate the position of their dot to student B without showing the diagram to student B.#5. Team member B with the help of student A’s communication will place the dot in the exact position of student A’s dot.

15. Locating Positions on Earth N E W S

16. Putting It All Together

17. C 4 E A 1 3 D B 2

18. Time Zones • What proves that the earth is moving? • What time is it right now? • If you called California right now, what time would it be? • How many degrees does the Earth rotate every day? • How many hours are there in a day? • How many degrees per hour does the earth rotate?

21. ? I.D.L-180* Prime Meridian 0* What time is at the following positions? ?

22. What is a time zone? • An area of about 15° of longitude, where society has determine an equal time 7 8 10