Which layer within the earth is molten (liquid)?
A. inner core
B. oceanic crust
C. outer core
D. mantle
Answer: C
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Given these concepts of elevation and temperature, why are there glaciers along the crest of the Andes Mountains so near the equator?
What will be an ideal response?
What is the minimum number of oxygen atoms present in a hemiacetal?
A) 0 B) 1 C) 2 D) 3
Which statement about the global carbon cycle is most accurate?
A. Less carbon enters the atmosphere than leaves the atmosphere. B. More carbon enters the atmosphere than leaves the atmosphere. C. Carbon enters and leaves the atmosphere in equal amounts.
Which of the following types of solar radiation is most penetrating into skin or leaves and thus potentially the most hazardous to health?
A. UVA (longest-wavelength UV) B. UVC (shortest-wavelength UV) C. visible light D. UVB (intermediate-wavelength UV)