Floods are becoming more common primarily because
A) precipitation has increased worldwide.
B) populations are more concentrated in vulnerable watersheds.
C) land use has changed, altering runoff, erosion and infiltration patterns.
D) the "sponge effect" of forests releases large and unpredictable amounts of water.
C
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Proxy data:
A) can only extend the temperature record back an additional 500 years. B) come quality-controlled instrument records. C) provide climate data representing times when instruments were not available to measure them. D) are difficult to find because they occur only in very limited areas.
Increased wind decreases evaporation rates
a. True b. False Indicate whether the statement is true or false
From the list provided below, choose those observations that accurately describe the mineral presented in this image.
A. This mineral has cleavage. B. This mineral is opaque, meaning that it is not clear; light does not pass through it. C. This mineral has a metallic luster. D. None of these choices are correct.
Pastoral nomads
A) are expanding their territory in North Africa and the Middle East. B) occupy only their own territory, moving with the seasons to find forage and water. C) occupy different territory each year to find forage and water. D) consume mostly meat, rather than grain. E) prefer sheep to goats because sheep require less water and will forage on virtually any vegetation.