Slide 1

Mapping Our World Slide 2 Essential Questions To Answer What is the difference between latitude and longitude Why is it important to give a citys complete coordinates when describing its location? Why are there different time zones from one geographic area to the next? What is the difference between latitude and longitude Why is it important to give a citys complete coordinates when describing its location? Why are there different time zones from one geographic area to the next? Slide 3 Latitude Longitude Maps are flat models of three-dimensional objects. Slide 4 The science of mapmaking is called cartography. The latitude of the north pole is 90 north. Slide 5 The equator is an imaginary horizontal line located at 0 latitude that circles Earth and separates it into two equal halves. Latitude is the distance in degrees north or south of the equator. Lines of latitude run parallel to the equator. Latitude Slide 6 The value in degrees of each line of latitude is determined by measuring the imaginary angle created between three specific points. Those points are: equator the center of Earth, the line of latitude Slide 7 Longitude Longitude is the distance in degrees east or west of the prime meridian. The prime meridian is an imaginary line that represents 0 longitude. Lines of longitude, also called meridians, are semicircles that extend vertically from pole to pole. Longitude is the distance in degrees east or west of the prime meridian. The prime meridian is an imaginary line that represents 0 longitude. Lines of longitude, also called meridians, are semicircles that extend vertically from pole to pole. Slide 8 Slide 9 The value in degrees of each line of latitude is determined by measuring the imaginary angle created between three specific points. Those points are: the prime meridian the center of Earth the line of longitude Slide 10 Slide 11 Using Coordinates Both latitude and longitude are needed to locate precise positions on Earth. Slide 12 Minutes Each degree of latitude or longitude is divided into 60 smaller units called minutes. Slide 13 Seconds Each minute of latitude or longitude is divided into 60 smaller units called seconds Slide 14 Scale Each degree() = 111 km Each Minute() = 1.85 km Each Second() = 30.83 m Note: works for latitude only Slide 15 Distance & Latitude Imagine you are on an airplane. Your plane has flown from 30 N to 42 N. How far have you flown? Solve: The difference between 30 N and 42 N is 12 . Each degree of latitude is roughly 111 km. Slide 16 The International Date Line is another name for the 180 meridian. International Date Line Slide 17 Traveling West ( ) across the International Date Line, you would move your calendar ahead one day. Sept. 1 Sept. 2 Slide 18 International Date Line Traveling East ( ) across the International Date Line, you would move your calendar back one day. East Sept. 1 Aug. 31 Slide 19 Slide 20 Longitude & Time Zones In most cases, each of Earths 24 time zones corresponds roughly to a line of longitude and represents a different hour. However, there are some exceptions. In most cases, each of Earths 24 time zones corresponds roughly to a line of longitude and represents a different hour. However, there are some exceptions. Slide 21 Which time zone is Virginia in? Slide 22 Review Question Lines of longitude are always parallel to each other. a.True b.False Lines of longitude are always parallel to each other. a.True b.False Slide 23 Review Question Where on Earth is 0 latitude? a.the North Pole b.the South Pole c.the equator d.the prime meridian Where on Earth is 0 latitude? a.the North Pole b.the South Pole c.the equator d.the prime meridian