What process involves the clumping of small particles into larger masses?
a. Condensation
b. Coagulation
c. Secretion
d. Accretion
ANS: D
Accretion clumps small particles together into larger masses. This process formed new planets,
including our own, from the dust and debris surrounding the sun. Information can be found in the
section Stars and Seas
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Water enters the atmosphere because of
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The gas that is produced as a result of the incomplete combustion of materials bearing carbon, when less oxygen is available is
A. carbon dioxide. B. water vapor. C. carbon monoxide. D. All the choices are correct.