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Conceptest: Box Modelling: Fluxes & Turnover Times

Jenny Fisher, University of Wollongong Australia, jennyf AT uow DOT edu DOT au
Questions used in MARE200 Introduction to Oceanography (2nd year undergraduate).

Question:

Which of the following is true of the simplified ocean-atmosphere water cycle depicted in the box model below?


A. There is a net flux of water from ocean to atmosphere.
B. There is a net flux of water from atmosphere to ocean. 
C. Water is in steady state, with a longer turnover time in the atmosphere than the ocean. 
D. Water is in steady state, with a longer turnover time in the ocean than the atmosphere.
 

Student Responses:

If you would like to help acquire more Before and After statistics for this example, please contact the author.

No data yet. The correct response is D. The fluxes are balanced so the system must be in steady state. The turnover time is defined as the reservoir size divided by the loss rate. As the loss rates are the same for both reservoirs, the larger reservoir (the ocean) corresponds to the longer turnover time.

References and Notes:


Subject

Geoscience:Oceanography:Chemical, Geoscience:Oceanography

Resource Type

Activities:Classroom Activity:Short Activity:ConcepTests

Grade Level

College Lower (13-14), Introductory Level

Earth System Topics

Oceans, Marine Chemistry

Theme

Teach the Earth:Teaching Environments:Intro Geoscience, Teach the Earth:Course Topics:Oceanography