Today, North America has several small- to medium-sized plates subducting beneath its ________.
A. eastern margin
B. northern margin
C. southeastern margin
D. western margin
E. margins, all around the North American Plate
Answer: D
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Living organisms draw their essential elements from
A) the atmosphere. B) the lithosphere. C) the atmosphere and lithosphere. D) the atmosphere, lithosphere, and hydrosphere.
Which of the following is true?
A) All enzymes are fibrous proteins. B) All enzymes are globular proteins. C) The majority of enzymes are fibrous proteins. D) The majority of enzymes are globular proteins.
Which of the following best defines the relationship between minerals and rocks?
A) A rock has an orderly, repetitive, geometrical, internal arrangement of minerals; a mineral is a lithified or consolidated aggregate of rocks. B) A mineral consists of atoms arranged in a geometrically repetitive structure; in a rock, the atoms are randomly bonded without any geometric pattern. C) In a mineral, atoms are bonded in a regular, repetitive, internal structure; a rock is a lithified or consolidated aggregate of mineral grains. D) A rock consists of atoms bonded in a regular, geometrically predictable arrangement; a mineral is a consolidated aggregate of rock particles.
A ria may exist where a stream reaches the ocean
Indicate whether the statement is true or false