Not sure what to go for.....=P?

Question

To describe a distance north or south of the equator, scientist use....

A.lines of latitude
B.the prime meridian
C.projection maps
D.contour lines

I'm goin for A. but i'm not sure.....=P

Answer 1

Latitude is an angular measurement in degrees (marked with °) ranging from 0° at the Equator (low latitude) to 90° at the poles (90° N for the North Pole or 90° S for the South Pole; high latitude). Latitude gives the location of a place on Earth north or south of the equator. Hence the answer is clearly A.
B) The Prime Meridian is the meridian (line of longitude) passing through the Royal Greenwich Observatory, Greenwich, England — it is the meridian at which longitude is defined to be 0 degrees. Since it is a north south line, it cannot help in defining the distance n or s of the equator. In fact it is used to define how far east or west a place is, with the help of parallels of longitudes.
C) Projection maps are used to project a 3D map to 2D. Since earth is a spherical object, any shape on the surface of the earth are actually a 3D object. to present it as a paper map, it has to be converted to a 2D object. This is done by one of various Projection Systems (like spherical, polyconic, transverse marcator etc), depending on the suitability and location of a place. The 2D maps thus produced is called a Projected Map and it has nothing to do with describing north of south distances.
D) Contour lines are lines connecting points of equal elevation from msl. It is used to describe the topography of a place and not the distance from equator.

Answer 2

That would be A, latitude. Final answer :-P

Answer 3

I'm gonna go with D...wait, no A.

Answer 4

you're right.