The central meridian is the tangent of a projection,the prime meridian is in Greenwich,England
Erosion has exposed many valuable minerals such as topaz and beryl.
Answer:
The elevation, or height, of each point above the lake is shown by the contour lines on the landscape below. 1. Suppose it rained for a while, and the lake level rose up 5 meters. [The house would be safe because the water would rise up to the 5 m line.]