Latitude and Longitude — Answer Key
Part A: Multiple Choice
Circle the best answer for each question.
1. A ship at 20 degrees N, 50 degrees W sails 5 degrees north. What are its new coordinates?
A) 15 degrees N, 50 degrees W
B) 25 degrees N, 50 degrees W
C) 20 degrees N, 45 degrees W
D) 20 degrees N, 55 degrees W
Sailing 5 degrees north from 20 degrees N adds 5 to the latitude, giving 25 degrees N while longitude stays at 50 degrees W.
2. A boat at 10 degrees S, 30 degrees E moves 4 degrees south. Where is the boat now located?
A) 6 degrees S, 30 degrees E
B) 14 degrees S, 30 degrees E
C) 10 degrees S, 26 degrees E
D) 10 degrees S, 34 degrees E
Moving 4 degrees south from 10 degrees S increases the southern latitude to 14 degrees S; longitude remains at 30 degrees E.
3. A ship at 40 degrees N, 70 degrees W travels 10 degrees east using GPS navigation. New position?
A) 40 degrees N, 80 degrees W
B) 40 degrees N, 60 degrees W
C) 50 degrees N, 70 degrees W
D) 30 degrees N, 70 degrees W
Sailing 10 degrees east from 70 degrees W reduces the western longitude to 60 degrees W; latitude stays at 40 degrees N.
4. A vessel at 5 degrees S, 100 degrees E moves 8 degrees west across open ocean waters.
A) 5 degrees S, 92 degrees E
B) 5 degrees S, 108 degrees E
C) 13 degrees S, 100 degrees E
D) 5 degrees N, 100 degrees E
Sailing 8 degrees west from 100 degrees E reduces the eastern longitude to 92 degrees E; latitude stays at 5 degrees S.
Part B: Fill in the Blank
Write the correct answer on each line.
1. A ship at 30 degrees N moves 7 degrees north, ending at 37 degrees N latitude on the chart.
Moving 7 degrees north from 30 degrees N latitude brings the ship to 37 degrees N latitude on the navigation chart.
2. Sailing east from 60 degrees W by 15 degrees brings a ship to 45 degrees W longitude.
Traveling 15 degrees east from 60 degrees W decreases the western longitude by 15, ending at 45 degrees W longitude.
3. A boat at 25 degrees S moves 8 degrees south to reach 33 degrees S latitude position.
Sailing 8 degrees south from 25 degrees S increases the southern latitude by 8, ending at 33 degrees S.
4. From 80 degrees E, a ship sails 12 degrees west and arrives at 68 degrees E longitude.
Traveling 12 degrees west from 80 degrees E reduces the eastern longitude by 12, ending at 68 degrees E longitude.
5. Sailors and pilots use GPS technology with satellites to track precise coordinate positions.
GPS, or Global Positioning System, uses satellite signals to determine exact latitude and longitude coordinates anywhere on Earth.