70 degrees N
0 degrees S
15 degrees E
44 degrees N
160 degrees W
88 degrees S
90 degrees N
90 degrees W
1) how many of the above grid lines run half-way around the world?
2) how many of the above are seen as points on the globe?
3) how many run east-west?
4) how many of the above grid lines follow great circle routes?
I'll be glad to check your answers.
1) 3
2) 4
3) 5
4) 3
Justin/Maryiah -- it's not necessary to change your name for each post. In this case, it's confusing to know who is answering this question.
1. Correct
2. Wrong
3. Correct
4. Wrong
To answer these questions, we need to understand the properties of latitude and longitude lines on the globe:
1) How many of the above grid lines run halfway around the world?
- The lines that run halfway around the world are the longitude lines. These lines are vertical and connect the North Pole to the South Pole. Since the question asks about the given grid lines, which include both latitude and longitude, we need to identify the longitude lines from the given coordinates. The longitude lines are indicated by the values in degrees after "N" or "S."
From the given coordinates, the following grid lines run halfway around the world:
- 160 degrees W
- 90 degrees W
So, two of the above grid lines run halfway around the world.
2) How many of the above are seen as points on the globe?
- Points on the globe correspond to the coordinates where the latitude or longitude is fixed. In the given list, the points are seen as:
- 70 degrees N
- 0 degrees S
- 44 degrees N
- 90 degrees N
So, four of the above grid lines are seen as points on the globe.
3) How many run east-west?
- The lines that run east-west are the latitude lines. These lines are parallel to the Equator. From the given coordinates, the following grid lines run east-west:
- 70 degrees N
- 0 degrees S
- 44 degrees N
- 88 degrees S
- 90 degrees N
So, five of the above grid lines run east-west.
4) How many of the above grid lines follow great-circle routes?
- A great circle route is the shortest path between any two points on a sphere (in this case, the Earth). Since the Earth is not a perfect sphere, only the latitude lines can be considered great circles because they are the only ones that are parallel, running east-west circles.
From the given coordinates, the following grid lines follow great circle routes:
- 70 degrees N
- 0 degrees S
- 44 degrees N
- 88 degrees S
- 90 degrees N
So, five of the above grid lines follow great circle routes.