4. Light extinction in pure water occurs: a. because of dissolved chemicals b. m

ID: 120677 • Letter: 4

Question

4. Light extinction in pure water occurs:

a. because of dissolved chemicals

b. more strongly at longer wavelengths

c. in the hypolimnion

d. as a result of absorbance and scattering

e. variably depending suspended sediment

5. A stratified lake will have more buoyant density layers near the surface. This means that...

a. compared to a non-stratified lake, it will require more energy and work to mix it to an average density

b. compared to a non-stratified lake, it will have a light absorbance pattern that is deeper

c. compared to a non-stratified lake, it will contain warmer temperatures at the bottom of the lake

d. all of the above

e. none of the above

6. Freshwater density is primarily determined:

a. light absorbance

b. the thermocline

c. suspended particles

d. temperature

e. Reynolds number

4) Light extinction in pure water occurs:

d. as a result of absorbance and scattering

5. A stratified lake will have more buoyant density layers near the surface. This means that...

d. all of the above

6. Freshwater density is primarily determined:

c. suspended particles

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