1 Oblate Sphere

2 Horizon

3 Lunar Eclipse

4 Protractor

5 Polaris

6 Altitude

7 Scale Model

8 Coordinate System

9 Hemisphere

10 Latitude

11 Parallels

12 Longitude

13 Meridians

14 Prime Meridian

15 International Dateline

16 Local Solar Time

17 Polar Diameter

18 Equatorial Diameter

19 Zenith

Dimensions of the Earth: Vocabulary

Websites for Evidence of Earth being Round

The Longest Dayhttp://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

Proving That The Earth is RoundDirections: Explain how each statement/diagram or video clip offers some type of proof that the earth is round

What would the person see from the lighthouse?

123

1 2 3

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.

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

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

Columbus Navigation

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

Jeremy on His Bike

• ://www.onr.navy.mil/focus/spacesciences/animation/observingsky/kid.swf

A.G.O What is the true Appearance of Earth

Think BoxWhich 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?

“Roundness” is indicated by the ratio of the polar diameter to the equatorial diameter. Formula

Round=PD/ED

Object Polar Diameter Equatorial Diameter Roundness

Sphere

Earth

Globe

Which of the Three Models was the best representation of a sphere?

Questions On Roundness

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?

Problem Solving Activity

Problem:

How can the accurate location of a position on a surface be communicatedbetween 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.

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.

Locating Positions on Earth

N

S

EW

Putting It All Together

A

B

C

D

E

31

2

Position Latitude/LongitudeABCDE

4

Position Latitude/Longitude70*S, 150*W40*N, 90*E0*, 150*W0*, 30*E

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?

Time Zones

Prime Meridian 0*I.D.L-180*

?

What time is at the following positions?

?

What is a time zone?An area of about 15° of longitude, where society has determine an equal time

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