The most voluminous layer of Earth is the
A. mantle.
B. outer core.
C. crust.
D. inner core.
Answer: B
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Evidence that we are living unsustainably includes which of the following?
a. Renewable forests are shrinking. b. Topsoil is eroding, and the lower atmosphere is warming. c. Deserts are expanding. d. Deserts are shrinking. e. Deserts are expanding, renewable forests are shrinking, topsoil is eroding and the lower atmosphere is warming.
Explain how analysis of glacial and polar ice cores provides important clues about past climate.
What will be an ideal response?
Which of the following describes a prog?
A. an instrument that draws lines on an upper-level chart B. a forecast chart that shows the atmosphere at some future time C. a new method of forecasting the weather D. a chart that interprets the current state of the atmosphere
At a pressure equivalent to a depth of 670 km the mineral olivine collapses to form ________.
A. perovskite B. calcite C. zircon D. quartz E. mica