Changing Waterways (pretest) – Flashcards

How is thermohaline circulation influenced by salinity and temperature? a. It is driven by density gradients, which are affected by salinity and temperature, with cold water and water with higher salt concentrations being more dense. b. It is driven by density gradients, which are affected by salinity and temperature, with warm water and water with higher salt concentrations being more dense. c. It is driven by density gradients, which are affected by salinity and temperature, with warm water and water with lower salt concentrations being more dense. d. It is driven by density gradients, which are affected by salinity and temperature, with cold water and water with lower salt concentrations being more dense.

Which of the following methods would help decrease marine pollution? a. government regulation of agriculture b. government regulation of industry c. reduction in chemical use d. all of the above

Increased awareness of water contamination can help reduce its effects.

Which of the following does not represent an impact of recreational activity on springs? a. destruction of native vegetation b. wildlife disruption c. decreased soil erosion d. water pollution

How does the loss of vegetation on shore lines affect waterways? a. decreased sedimentation b. increased shorelines c. increased erosion of water banks d. none of the above

Reducing access to waterways will lead to an increase in human impact on waterways.

Which of the following practices could help reduce erosion of water banks? a. buffer strips b. natural fertilizers and pesticides c. decrease in fossil fuel emissions d. all of the above

Flooding on rivers is caused by human activity rather than natural events.

How is an oxbow lake formed? a. An oxbow lake is formed when a lake shrinks due to erosion. b. An oxbow lake is formed when the wide bend of a river is cut off. c. An oxbow lake is formed when high concentrations of salt are present in lakes. d. An oxbow lake is formed when a dam or levee is built on a river.

How does flooding affect rivers? a. It causes river bends to be cut off. b. It picks up deposits from floodplains. c. It causes rivers to divert. d. It causes river channels to change shape