Economically valuable deposits of phosphorite are composed of which key mineral?

A. Asbestos
B. Gypsum
C. Calcite
D. Apatite


Answer: D

Environmental & Atmospheric Sciences

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The light blue area just off the Australian coast, as shown here, is called the



A) continental platform.
B) seashore.
C) continental shelf.
D) abyssal plain.

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What are the most common, large-scale features on a depositional coast?

A) Barrier islands B) Moraines C) Sand spits D) Deltas

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Phytoplankton biomass can be measured by satellite.

Answer the following statement true (T) or false (F)

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What is the primary factor that explains migration?

A) climate B) economic incentives C) historical circumstances D) stage of the life-cycle (retirement, etc.) E) supply curves

Environmental & Atmospheric Sciences