How do calcareous oozes form?
A) The particles are precipitated by bottom-dwelling organisms.
B) The particles are precipitated in the water column below the depth of sunlight penetration and then sink to the bottom.
C) The particles settle out from calcite-rich turbidity currents at depths greater than 15,000 feet.
D) The particles are precipitated in warm surface waters and sink to the bottom.
D
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An old showerhead delivers approximately 3 gallons of water per minute. Assuming that a person showers twice a day for 5 minutes each time, what is the total amount of water that is consumed for this activity annually?
What will be an ideal response?
An unconfined water table is the ________.
a.) boundary between the aerated and unsaturated zones b.) boundary between the saturated zone above and partly saturated zone below c.) bottom boundary surface of the saturated zone above an aquitard d.) boundary between the aerated zone above and saturated zone below
Which of the following does NOT represent one of the United States' 3 main eras of immigration?
A) involuntary migration from Sub-Saharan Africa in the seventeenth and eighteenth centuries B) voluntary migration from the British Isles due to religious persecution in the seventeenth and eighteenth centuries C) Ellis Island became a major immigration processing center in the late nineteenth and twentieth centuries. D) Early twentieth century immigrants from southern and eastern Europe coincided with the diffusion of the Industrial Revolution through continental Europe. E) The leading sources of twenty-first century Asian immigration are the result of climate change in places such as Bangladesh, Oceania, or the Maldives.
If you drilled into an oceanic plateau, what would you most likely find?
A. large amounts of basalt derived from melting in the mantle B. andesitic volcanoes buried by turbidity currents C. a normal thickness of oceanic crust overlain by andesitic volcanoes D. a thin layer of oceanic sediment over continental crust