Judge the following sentence according to the criteria given below: Californian mountain slopes
burned by wildfires are not very susceptible to debris flows the following wet season BECAUSE
scorched chaparral vegetation releases a waxy liquid that waterproofs the ground.
a. The assertion and the reason are both correct, and the reason is valid.
b. The assertion and the reason are both correct, but the reason is invalid.
c. The assertion is correct, but the reason is incorrect.
d. The assertion is incorrect, but the reason is correct.
e. Both the assertion and the reason are incorrect
D
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During the night, clouds:
A) keep the air cooler by reflecting shortwave energy back to space. B) keep the air warmer by absorbing and re-emitting longwave energy back to the surface. C) keep the air cooler by accelerating longwave energy loss to space. D) keep the air warmer by reflecting shortwave energy back to the surface.
A soil is sometimes called "mature" when ____
a. it begins supporting living vegetation b. a well-defined A horizon appears c. it begins to erode away d. it has reached an equilibrium condition e. a well-defined E horizon appears
HDI is function of
A) standard of living, education, and health. B) standard of living, environmental health, and democracy. C) education, health, and democracy. D) fair trade, sustainability, and education. E) low debt, education, and health.
Which of the following is an example of an ecosystem?
A) a colony of leafcutter ants, the leaves they harvest, and the fungi that they cultivate and tend to B) a colony of leafcutter ants living in a forest C) a colony of leafcutter ants, the leaves they harvest, the fungi that they cultivate and tend to, and the soil nutrients and moisture needed for their garden D) a colony of leafcutter ants and the leaves they harvest for their fungal garden E) These are all examples of ecosystems.