Question

standard sc.912.l17.11
question: hydroelectric and coal - fired power plants produce electricity in a similar way. in both cases, an energy source is used to spin a turbine that will then generate electricity. the difference is that a coal - fired plant uses steam while the hydroelectric plant uses falling water to turn the blades of the turbine.
which is not an environmental cost of hydroelectric power plants?
a. alters the natural flow of water downstream
b. increased greenhouse gasses being released
c. disruption of the life cycle of salmon
d. flooding of upstream habitat near a dam

standard sc.912.l17.9
question: if the mouse population was removed, what would be the long - term effects of available energy in the ecosystem?
a. the energy available for the producers would increase.
b. the energy available for the tertiary consumers would decrease.
c. the energy available for the primary consumers would decrease.
d. the energy available for the secondary consumers would increase.

step three: answer the question, and explain why each incorrect answer choice is wrong.
a.
b.
c.
d.

step three: answer the question, and explain why each incorrect answer choice is wrong.
a.
b.
c.
d.

Explanation:

Day 3 Question

Hydroelectric power plants do not release greenhouse - gases during electricity generation. Altering water flow, disrupting salmon life - cycles, and upstream flooding are environmental costs.

Mice are primary consumers. If removed, the energy available to secondary consumers (that eat mice) would decrease as their food source is gone. Producers are not affected by primary - consumer removal in terms of available energy. Tertiary consumers that rely on secondary consumers which eat mice would also be affected negatively.

Answer:

B. increased greenhouse gasses being released

Day 4 Question