UNIT ONE: Toward Independence Lesson 17
 Home Interactive Notebook Gradesheet Table of Contents Flashcards Lesson 1 Lesson 2 Lesson 3 Lesson 4 Lesson 5 Lesson 6 Lesson 7 Lesson 8 Lesson 9 Lesson 10 Lesson 11 Lesson 12 Lesson 13 Lesson 14 Lesson 15 Lesson 16 Lesson 17 Lesson 18 Lesson 19 Lesson 20 Lesson 21 Lesson 22 Lesson 23 Lesson 24 Lesson 25 Lesson 26 Lesson 27 Lesson 28 Lesson 29 Lesson 30 Lesson 31 Lesson 32 Lesson 33 Lesson 34 Lesson 35 Lesson 36 Lesson 37 Lesson 38 Lesson 39 Lesson 40 Lesson 41 Lesson 42 Lesson 43 Lesson 44 Lesson 45 Lesson 46 Lesson 47 Lesson 48 Lesson 49 Lesson 50 Lesson 51 Lesson 52

LONGITUDE AND TIME

 LEFT SIDE PAGE 40 1 WARM UP What is time? How did people measure time in the past? What defines a day?   Check out Earth Viewer byCLICKING HERE!                     3 Read and Attach: "Longitude and Time" Create margin notes on what you think is important. Individually - Underline and highlight important information; in the margin provide a question or comment foe each hihlighted piece. Share with your partner what you thought and selected.  Made changes if necessary. Click HERE to download a copy of the worksheet.
 RIGHT SIDE PAGE 41                                   2 OBJECTIVES: Explain the concepts of "time" and "day". Explain how longitude creates time zones. Explain how the International Date Line operates.                                                   4 NOTES: Time "Simply what a clock reads" - Einstein The clock can be the rotation of a planet, sand falling in an hour glass, a heartbeat, or vibrations of a cesium atom Time is represented through change, such as the rotation of the Earth Time is the measurement of the movement of the Earth and its relationship to the Sun Day Created by the Earth's movement of ROTATION One complete rotation or spin Spins counterclockwise in other words, the Earth spins eastward so the Sun rises in the east When the Sun is at its zenith, highest point, it is noon there from midnight to noon is called "ante meridiem" means "before noon" abbreviated A.M. from noon to midnight is called "post meridiem" means "after noon" abbreviated P.M. Places to the east have a later time than places to the west Time Zones 15º wide band 360º divided by 24 (hours in the day) = 15 the time zone is centered in each band 7 1/2º to the east and the west Time zones are not straight lines time zones zigzag to meet the needs of people Time zones to the east are later, time zones to the west are earlier Each time zone is usually 1 hour in difference International Date Line A line of longitude Opposite the the Prime Meridian (180º) Runs throught the Pacific Ocean Not a straight line A Dateline Travel eastward across the IDL, a calendar day earlier (Monday changes to Sunday) Travel westward across the IDL, a calendar day later (Sunday changes to Monday) The TIME remains the same, only the date changes
 Add the Following Items to Your Glossary (22-25)   Time Day Time Zones International Date Line