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Test Bank for Marine Biology: Function, Biodiversity, Ecology 2E - page 16 / 44





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d. Have broader biogeographic ranges than species with non-planktonic larvae

Chapter 6

The Reynolds number increases when

a. A.water velocity decreases

b. size of the object increases

c. water velocity increases

d. B and C

Within a boundary layer

a. Flow is always turbulent

b. Water velocity is less than in the main stream

c. Water velocity is zero

d. Reynolds number is always higher than in the main stream

Bernoulli's principle predicts

a. That pressure near an object increases as water velocity increases

b. That velocity varies with cross sectional area

c. That pressure varies inversely with flow velocity

d. That small objects sink at constant velocity

In a system of pipes, if water enters the system at a given velocity, what happens if the cross-sectional area triples

a. Velocity triples

b. No effect on velocity

c. Velocity decreases to the third power of initial velocity

d. Velocity decreases to one third the initial velocity

You can reduce drag on a fixed object in a fluid by

a. Increasing the cross-sectional area exposed to the flow

b. Decreasing the cross-sectional area exposed to the flow

c. Adding projections out from the side to break up the flow

d. Changing its density

Inertial forces dominate strongly when

a. Re < 1

b. Re < 200

c. Re > 1000

d. Re > 10

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