Which of the following scenarios best describes a density-dependent factor limiting population growth?
A) A particularly dry summer shrinks and dries up many ponds in central Canada, causing increased aggression and competition for limited nest sites among female common goldeneyes (ducks).
B) A particularly snowy winter makes it difficult for female deer to find food, thus affecting their ability to reproduce.
C) A tropical storm strikes one of the Hawaiian Islands and wipes out a population of nénés that had been recovering from near-extinction.
D) An April blizzard kills off many migrating barn swallows, which could not tolerate the cold and snow.
E) A homeowner sprays her lawn with broadleaf herbicide to kill the dandelions that have started growing there that spring.
Answer: A
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a. 2, 10 b. 5, 10 c. 8.6, 15 d. 25, 50 e. 30, 100
What are the values for the size, pressure changes, and lifespan of the typical hurricane?
What will be an ideal response?
Loess is _____
a. commonly deposited on the upwind margins of deserts b. composed primarily of gravel-size sediment c. primarily transported by eolian suspension d. primarily transported by surface creep e. deposited out of solution from desert stream water
Which of the following best describes tornado development?
A) Evaporation over warm ocean waters leads to convective thunderstorms; as laten energy is released as the water vapor condenses, tornadic activity is spawned. B) A horizontally rotating body of air is tipped vertically by an updraft with a cumulonimbus cloud, forming a mesocyclone, which can generate tornado activity. C) Strong downdrafts in a cumulonimbus cloud cause the formation of funnel clouds, which pulse from the bottom sometimes forming tornadoes. D) Orographic uplift near warm ocean currents forces warm, moist air to rise and cool to dew point. The latent heat associated with condensation leads to strong downdrafts and tornado formation. E) Bands of rapidly moving thunderstorms create powerful, straightline winds.