Which of the following best defines a mineral and a rock?
A) A mineral consists of its constituent atoms arranged in a geometrically repetitive structure; in a rock, the atoms are randomly bonded without any geometric pattern.
B) A rock consists of atoms bonded in a regular, geometrically predictable arrangement; a mineral is a consolidated aggregate of different rock particles.
C) In a mineral the constituent atoms are bonded in a regular, repetitive, internal structure; a rock is a lithified or consolidated aggregate of different mineral grains.
D) A rock has an orderly, repetitive, geometrical, internal arrangement of minerals; a mineral is a lithified or consolidated aggregate of rocks.
C
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When a boulder and a pebble are dropped, the pebble falls as fast as the boulder because
A. both accelerate equally. B. both pick up speed equally. C. its ratio of gravitational force to mass is the same as the boulder's. D. air resistance is less for the pebble.
The laminar boundary layer is important to which of the following processes?
A) radiation B) transmission C) radiation D) conduction
The U.S. Surface Mining Control and Reclamation Act of 1977 requires ________
A) 20% of sales revenues to be donated to national park maintenance B) mining companies to post bonds to cover restoration of mined areas before permits are granted C) restoration of the identical ecosystem and biodiversity present before mining began D) no remediation of water pollution, except in the case of uranium mining E) all mined minerals to be processed and sold only within the United States
How much money was remitted to Southeast Asia in 2013?
A) $750 million B) $437 million C) $47 billion D) $24 billion E) $10 billion