Question

1. refer to the following statements to answer question 93. i. increased atmospheric concentrations of co₂ result in increased ocean temperatures. ii. increased atmospheric temperatures by increasing evaporation rates could conceivably decrease ocean temperatures. which of the following statements is true? (a) statement i represents a positive feedback mechanism, while statement ii represents a negative feedback mechanism. (b) statement i represents a negative feedback mechanism, while statement ii represents a positive feedback mechanism. (c) both statements i and ii represent positive feedback mechanisms. (d) both statements i and ii represent positive negative mechanisms. (e) not enough information is available to determine whether the statements are either examples of positive or negative feedback mechanisms. 94. which of the following effects would result from the shutdown or slowdown of the thermohaline circulation pattern? (a) a warmer scandinavia and great britain (b) freshwater fish moving into the open ocean (c) a colder scandinavia and great britain (d) a saltier ocean (e) a drier scandinavia and great britain 95. the federal department or agency that is ultimately responsible for oceanic and atmospheric monitoring and research is the (a) environmental protection agency (b) department of the interior (c) department of commerce (d) department of state (e) department of agriculture 96. the largest number of species are being exterminated per year in (a) grasslands (b) deserts (c) forests (d) tropical rain forests (e) the tundra 97. a certain species of plant is placed on the threatened species list. several years later it is placed on the endangered species list. this is an example of (a) a negative - negative feedback loop (b) a positive - negative feedback loop (c) a negative - positive feedback loop (d) a negative - feedback loop (e) a positive - feedback loop

Explanation:

• Question 93: In statement I, increased CO₂ leads to increased ocean temperatures, which further enhance the warming effect, a positive - feedback. In statement II, increased evaporation due to higher atmospheric temperatures cools the ocean, a negative - feedback.
• Question 94: The thermohaline circulation brings warm water to Scandinavia and Great Britain. A shutdown or slowdown would result in a colder climate there.
• Question 95: The National Oceanic and Atmospheric Administration (NOAA) which is part of the Department of Commerce is responsible for oceanic and atmospheric monitoring and research.
• Question 96: Tropical rain forests have the highest biodiversity and are experiencing the largest number of species extinctions due to deforestation and other human - activities.
• Question 97: As the plant species' situation worsens from threatened to endangered, the factors causing its decline are reinforcing the negative trend, which is a positive - feedback loop.

Answer:

A. Statement I represents a positive feedback mechanism, while statement II represents a negative feedback mechanism.
C. A colder Scandinavia and Great Britain
C. Department of Commerce
D. tropical rain forests
E. a positive - feedback loop