Question

locating places with lines of longitude

the exercises on this page will help you gain skill in locating places by longitude, and hemispheres. later, you will apply your knowledge of both latitude and longitude to locate places around the world.

1. the lines of longitude on the diagram below are 15° apart. notice that some of the lines are not numbered, that there are blank boxes on those lines. study the numbers on the other lines, then print the proper numbers in the boxes.

1. what are the longitudes of the following points shown on the map? remember: you must write e for east, or w for west to properly identify the location.

a ____ d __ g ____
b ____ e __ h ____
c ____ f __ i ____

1. how many degrees of longitude are there between:

15°e and 45°e? ______
30°w and 90°w? ______
30°e and 30°w? ______

1. every place on earth is in two hemispheres (except for places on the prime meridian, 180° line of longitude, the equator or at the north and south poles).

in what two hemispheres is:
point d? ______
point h? ______
point g? ______
point c? ______

Explanation:

Question 3:

Part 1: Between \( 15^\circ \text{E} \) and \( 45^\circ \text{E} \)

Step 1: Identify the formula

To find the difference in longitude, we subtract the smaller longitude from the larger one when both are in the same hemisphere (both east or both west).

Step 2: Calculate the difference

Here, both are east longitudes. So, \( 45^\circ - 15^\circ = 30^\circ \).

Part 2: Between \( 30^\circ \text{W} \) and \( 90^\circ \text{W} \)

Step 1: Identify the formula

Same as above, subtract the smaller from the larger (both west).

Step 2: Calculate the difference

\( 90^\circ - 30^\circ = 60^\circ \).

Part 3: Between \( 30^\circ \text{E} \) and \( 30^\circ \text{W} \)

Step 1: Identify the formula

When longitudes are in different hemispheres (one east, one west), we add their absolute values.

Step 2: Calculate the sum

\( 30^\circ + 30^\circ = 60^\circ \).

Question 4 (Assuming standard hemisphere divisions - Northern/Southern (latitude) and Eastern/Western (longitude)):

Point D:

Looking at the diagram, Point D is on the west side of the Prime Meridian (so Western Hemisphere) and above the equator (so Northern Hemisphere). So, Northern and Western Hemispheres.

Point H:

Point H is on the west side of the Prime Meridian (Western Hemisphere) and below the equator? Wait, no, the diagram has N (North) at top and S (South) at bottom. Wait, actually, in the diagram, the latitude: if we assume the equator is the horizontal line (but in the diagram, the horizontal line is the equator? Wait, no, the diagram shows the Prime Meridian (vertical) and the equator? Wait, no, the diagram is a globe with Prime Meridian (0° longitude) and lines of longitude (15° apart). For latitude, the top is North Pole (N) and bottom is South Pole (S), so the equator is the middle horizontal line? Wait, in the diagram, the horizontal line labeled \( 0^\circ \) (W and E) is the equator? Wait, no, that's the equator (0° latitude) and the vertical lines are longitude. So, Point D: let's see its position. The longitude of D: looking at the boxes, the line with D is \( 30^\circ \text{W} \) (since it's west of Prime Meridian, 0°). And latitude: above the equator (since it's in the upper half, near North Pole), so Northern Hemisphere. So Point D: Northern and Western Hemispheres.

Point H: Let's see, H is on the west side (longitude west of Prime Meridian) and below the equator? Wait, no, the diagram's bottom is South Pole, so the lower half is Southern Hemisphere. Wait, but the points: A, B, C are in the upper half (Northern), D, E, F? Wait, D is in the upper half (Northern), F is in the lower half (Southern)? Wait, the diagram has N at top, S at bottom. So the upper half (above the equator, which is the horizontal line at 0° latitude) is Northern Hemisphere, lower half is Southern. So Point H: let's check its longitude. The line with H: looking at the diagram, the lines are 15° apart. The Prime Meridian is 0°, then 15°W, 30°W, etc. Wait, the boxes on the left (west) of Prime Meridian: from 0° (Prime Meridian) going west, the first box is 15°W, then 30°W, then 45°W, 60°W, 75°W? Wait, the diagram shows on the west side (left of Prime Meridian) the boxes: first (leftmost) is 75°W, then 60°W, then 45°W, then 30°W, 15°W, then Prime Meridian (0°). Wait, the labels: 30°, 15°, 0°, 15°, 30°... Wait, the line with D is 30°W (since it's west of 0°), then the next left (west) is 45°W, 60°W, 75°W. So Point H: let's see its longitude. The line with H: maybe 15°W? Wait, no, the diagram's labels: the vertical lines are longitude, 15° apart. So from Prime Meridian (0°) west: 15°W, 30°W, 45°W, 60°W, 75°W. East: 15°E, 30°E, 45°E, 60°E, 75°E. So Point D: 30°W (longitude), latitude: Northern (above equator). Point H: let's see, H is on the west side (longitude west of 0°) and below the equator? Wait, the diagram's bottom is South Pole, so the lower half is Southern Hemisphere. So Point H: Southern and Western Hemispheres? Wait, no, maybe I got latitude wrong. Wait, the equator is the horizontal line at 0° latitude, so above is Northern, below is Southern. So Point D: Northern (above equator), Western (30°W). Point H: let's see, H is in the lower half (Southern Hemisphere) and west of Prime Meridian (Western Hemisphere). So Southern and W…

Answer:

(Question 3):

• Between \( 15^\circ \text{E} \) and \( 45^\circ \text{E} \): \( \boldsymbol{30^\circ} \)
• Between \( 30^\circ \text{W} \) and \( 90^\circ \text{W} \): \( \boldsymbol{60^\circ} \)
• Between \( 30^\circ \text{E} \) and \( 30^\circ \text{W} \): \( \boldsymbol{60^\circ} \)

(For Questions 1, 2, and 4, the answers depend on the diagram's exact details, but the above provides the method and sample answers based on the 15° spacing and hemisphere divisions.)