During its initial formation by the accretion of particles, the young Earth was ____
A) shrouded in a thick atmosphere
B) density stratified with a core, mantle, and crust
C) likely chemically homogenous throughout
D) completely covered by an ocean
C
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When do tidal currents reach their maximum velocity?
a. Midway between slack water and high tide b. Midway between low tide and slack water c. Midway between high and low tide d. During the flood current e. During the ebb curr
Which one of the following best describes a flux?
A) Movement of elements or compounds between reservoirs in a biogeochemical cycle B) A type of flower used for food and fiber; also known as linseed C) Variation in output from a large water reservoir, such as output through a hydroelectric dam D) A pool or reservoir where an element or compound is stored within a biogeochemical cycle
Winds that blow predominantly from the northeast and the southeast are the
A) westerlies. B) polar easterlies. C) horse latitudes. D) trade winds.
Natural and synthetic chemicals in the environment that can harm the human nervous system are called ____.
A. insecticides B. herbicides C. neurotoxins D. chemotoxins E. antibodies