Which of the following statements about increasing ocean temperatures as a result of global warming is correct?
A) Deep ocean waters are not yet showing signs of increased temperature.
B) Deeper ocean waters are warming faster than expected.
C) Ocean warming has not been documented below a depth of 0.5 kilometers.
D) The warming of surface waters is uniform throughout the ocean.
E) There has been an overall decrease in ocean surface temperature.
B
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The most effective way to reduce malaria in a region is by using
A) Salmonella control to treat infections and treatment strategies to prevent infections. B) vector control to prevent infections and treatment strategies for infections. C) antiviral medicines to reduce fevers and prevent disease transmission. D) better hygiene, improved sanitation practices, and uncontaminated sources of water.
Dr. James Hansen of NASA has stated that we should set a goal of keeping CO2 levels below 350 ppm. Which year did we first exceed that level? If we decreased CO2 levels at the same rate that we have increased them over the past 10 years, how long would it take until CO2 levels were again below 350 ppm?
What will be an ideal response?
The most common way for air to be cooled in order that a cloud may form is by:
A) rising and expanding. B) sinking and contracting. C) emitting radiation. D) reflecting radiation. E) evaporating water.
What statement most accurately describes the theory of seafloor spreading?
A)Subduction zones produce oceanic crust that moves away from these zones by seafloor spreading toward mid-oceanic ridges where it is consumed. B)Oceanic crust continuously forms across the seafloor and is moved by subduction zones toward mid-oceanic ridges where it is consumed. C)Oceanic crust continuously forms at mid-oceanic ridges, moves away from these ridges by seafloor spreading, and is consumed at subduction zones. D)Earth's molten core material erupts at mid-oceanic ridges, moves away from these ridges by seafloor spreading, and is consumed at subduction zones. E)Subduction zones force oceanic crust to spread across the seafloor before being consumed at a fault valley.