Turnover of Water in Temperate Lakes During the Spring and Fall

question 5

Multiple Choice

Turnover of water in temperate lakes during the spring and fall is made possible by which of the following?

• A) warm, less dense water layered at the top
• B) cold, more dense water layered at the bottom
• C) a distinct thermocline between less dense warm water and cold, dense water
• D) the changes in the density of water as seasonal temperatures change
• E) currents generated by nektonic animals

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Definitions:

Long-run Equilibrium

A state in economics where all factors of production are fully adjusted to the market condition and all economic agents have no incentive to change their behavior.

Consumer Demand

The desire and willingness of consumers to purchase a certain quantity of goods or services at various price points, at a particular time.

Competitive Increasing-cost Industry

An industry where supply costs increase as output expands, often because resources become scarcer or harder to obtain as production grows.

Long-run Equilibrium

A state in which all firms in a perfectly competitive market earn zero economic profits, with no incentives for new firms to enter or existing firms to exit.