A dead zone refers to
A) terrestrial areas in which excessive nitrogen fertilizer has essentially burned the soil, preventing plants and microorganisms from living there.
B) an ecosystem that was cleared of all vegetation for slash and burn agriculture.
C) hypoxic areas in water bodies that limit marine and aquatic life.
D) oligotrophic areas in water bodies that cannot support life due to lack of nutrients.
C
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What will be an ideal response?
Three types of resources are used to produce goods and services. They are ____________________, ____________________ and ____________________.
Fill in the blank(s) with the appropriate word(s).
________ is the relative long-distance movement from one region of a country to another
A) Interregional migration B) Intraregional migration C) Forced migration D) Regional mobility E) International mobility
In the Northern Hemisphere, air found to the north of the polar front is ____, while air further south is ____
a. cold; warm b. cold; cold c. of moderate temperature; cold d. warm; warm e. of moderate temperature; warm