What are some of the functions of an estuary? Can you hypothesize why it is important to save for
animals? What about for humans? What will be an ideal response?
ANS:Answer
should include:
? Estuaries are able to support an enormous amount of organisms. They are very rich in
nutrients and receive sunlight. The location of an estuary provides shelter from wave
shock.
? There is high biological activity and diversity in estuaries.
? They are a nursery ground for many organisms.
? Estuaries can "scrub" pollutants in the water. Bacteria in the sediment can also remove
inorganic nitrogen compounds.
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Why is biosynthesis unlikely to occur today as it did in Earth's youth?
A) Living organisms have altered oceanic and atmospheric conditions B) There is less available oxygen in the atmosphere C) Ozone is less protective from the sun's influence D) All of these choices are true
A dry climate is defined as ________
A) one were the evaporation exceeds the precipitation B) one where the rainfall is less than 10 cm per year C) a climate where wind is the dominate form of erosion D) a climate where the temperature is over 25°C E) all of the above
What is the origin of smooth troughs (T on this figure) cutting across the landscape in the Great Lakes area?
A) The areas were covered by soft marine sediments.
B) A huge flood coming from Iowa flowed toward the Great Lakes.
C) Glaciers carved out the smooth troughs.
D) All of these are correct.
Nanotechnology and microtechnology are similar in that they both
A. have huge impacts on society. B. are interdisciplinary. C. are relatively new technologies. D. all of the above