D. An X-Y coordinate system, with the origin at 0° latitude and 0° longitude
Answer:
On a planimetric map, the map scale is used to convert between the distance on the map and the actual distance in real life.
A thermocline is the transition layer between the warmer mixed water at the surface and the cooler deep water below. It is relatively easy to tell when you have reached the thermocline in a body of water because there is a sudden change in temperature.
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