G7 Science Q4- Week 1- Locating Earth.ppt
- 1. LOCATING PLACES ON EARTH PREPARED BY: NONA WAYNE D. SEMBRANA
- 2. Demonstrate how places on Earth may be located using a coordinate system S7ES - IVa - 1
- 4. How it works? ? GPS satellites circle the earth twice a day in a very precise orbit and transmit signal information to earth. GPS receivers take this information and use trilateration to calculate the user's exact location. trilateration is the process of determining absolute or relative locations of points by measurement of distances, using the geometry of circles, spheres or triangles.
- 6. ? A GPS receiver must be locked on to the signal of at least 3 satellites to calculate a 2-D position (latitude and longitude) and track movement. Once the user's position has been determined, the GPS unit can calculate other information, such as speed, bearing, track, trip distance, distance to destination, sunrise and sunset time and more
- 10. GOOGLE EARTH ? 3D mapping program from Google that covers the entire globe from satellite images ? Requiring a download for Windows, Mac and Linux desktops, a street address can be searched, and the views can be zoomed down to the individual building all the way up to a satellite's view of the globe
- 15. USING LATITUDE AND LONGITUDE
- 16. ?Any location on Earth is described by two numbers--its latitude and its longitude. If a captain of a plane wants to specify position on a map, these are the ¡°coordinates¡± they would use.
- 17. LONGITUDE AND LATITUDE ?these are two angles measured in degrees, ¡°minutes of arc¡± and ¡°seconds of arc¡± ?These are denoted by the symbol ( ?, ' , '' ) ? Example: 35? 43 ' 9 ''
- 18. LATITUDE ? lines that go EAST and WEST ? also known as PARALLELS ? best known parallel of latitude is the EQUATOR ?the Equator divides the Earth into two equal parts. ?HEMISPHERES
- 19. LATITUDE measures distance north and south of the Equator numbered 0 to 90 ? As the number of the latitude becomes higher, the farther it is from the Equator In writing degrees of latitude, the word ¡°North¡± (N) or ¡°SOUTH¡± (S) is added
- 20. EXAMPLE ? SEATTLE, WASHINGTON ?47? NORTH ? LIMA, PERU ?12? SOUTH
- 21. LONGITUDE ? term used for the lines found in the east-west direction ? beginning line is at GREENWICH (Great Britain) ?PRIME MERIDIAN ( 0 ?) ? In reading reading degrees longitude, you add ¡°EAST¡± (E) or ¡°WEST¡± (W)
- 22. LONGITUDE MERIDIAN is the term used for the lines that show longitude. The Meridian of 180 degrees WEST is the same as that of 180 degress EAST. ?Every meridian must cross the equator. ?since equator is a circle, it'll be divided into 360 ? and the longitude of a point is then the marked value of a division where its meridian meets the equator.
- 25. E, PM, IDL
- 28. INTERNATIONAL DATE LINE ? imaginary line of navigation on the surface of the Earth that runs from north pole to the south pole and demarcates the change of one calendar day to the next ? found in the middle of the Pacific Ocean
- 29. IS IT A STRAIGHT LINE? It runs from pole to pole mostly through the Pacific Ocean but bends to the east to include Siberia with Russia, and bends to the West to include the Aleutian Island with Alaska. It bends to the East once more to keep all the Fiji islands on one side of the line.
- 32. TIME ZONES
- 33. TIME ZONES Time zones have irregular boundaries to make alowance to political frontier. Measured through 0?longitude
- 34. TIME ZONES ?Because the Earth is divided into 360? longitude and completes a spin on its axis in a day (24 hours), the time alters by one hour for every 15?of longitude.
- 36. QUIZ ? What is the latitude and longitude of : 1. MEXICO CITY 2. LOS ANGELES, CALIFORNIA 3. KUALA LUMPUR, MALAYSIA 4. SYDNEY, AUTRALIA 5. MANILA, PHILIPPINES 6. BAGHDAD, IRAQ 7. DUBLIN, IRELAND 8. KAMPALA, UGANDA 9. PORT VILA, VANUATU 10. LIMA, PERU ? If it's 8:00 p.m. in the Philippines, what time is it in: 1. PARIS, FRANCE 2. TAIWAN 3. NEW YORK, USA 4. JAPAN 5. ARGENTINA
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