Why do oceanographers take measurements of the conductivity of the seawater?
A. Conductivity tells water temperature.
B. Conductivity can be used to calculate the salinity of the water.
C. Conductivity helps oceanographers avoid dangerous electricain
situations.
D. Conductivity tells how much marine life is in the water.

B. Conductivity can be used to calculate the salinity of the water.

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indicate valleys, hills, steepness and gentleness of slopes.

explanation:

contour lines on a map indicate elevation, or depth. numeric notations on contour lines refer to the level of elevation, or height about sea level.

answerlinnaeus;