Reading Questions- Chapters 4, 5, and 6

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Apr 3, 2024

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What two processes cause water to become denser and sink? thawing and dilution thawing and evaporation freezing and dilution Correct! freezing and evaporation Question 2 1 / 1 pts What features of water in the global ocean conveyor would have to change to pass a critical point or “tipping point” and change the world’s climate? temperature or turbidity density or acidity Correct! temperature or density temperature or acidity Question 3

1 / 1 pts What caused eastern North America and Europe to plunge into an ice age in the blockbuster hit The Day After Tomorrow ? surface currents reversed direction deep ocean currents moved faster Correct! deep ocean currents slowed down surface currents slowed down Question 4 0 / 1 pts What change in Arctic seas caused the global ocean conveyor belt to stop abruptly in the past? Correct Answer decreased salinity increased salinity decreased temperature increased temperature Question 5 1 / 1 pts

Upwelling regions cover only 1% of the global ocean, so why are they so important? They are regions where surface water sinks. They are home to 75 % of the world’s coral. They are the only sunlit zones available. Correct! They provide half of the global fish catch. Question 6 0 / 1 pts What has been the consequence of overfishing of sardines off the coast of Namibia? Phytoplankton populations drastically declined. Sardines were replaced by invasive Peruvian anchovies. Correct Answer Sulfide fogs irritate eyes and throats of coastal residents. Nationwide, Nambian citizens no longer have enough food. Question 7

1 / 1 pts What two factors caused anoxia and sulfide eruptions along the Namibian coast? overfishing and invasive species overfishing and pollution pollution and climate change Correct! overfishing and climate change Question 8 1 / 1 pts What three factors will reduce the productivity of fish stocks? Correct! higher temperatures, less oxygen, and overfishing acidification, less oxygen, and overfishing invasive species, less oxygen, and acidification less oxygen, acidification, and overfishing Question 9

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