The process by which lighter particles get stuck to heavier particles is called
a) accretion
b) nuclear fusion
c) nuclear fission
d) nebula
e) supernova
Answer: a) accretion
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He epicenter of an earthquake is the ________.
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____ caused a major tsunami wave in Alaskan coastal fjords
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A leech that sucks blood from an animal is in an example of commensalism
Indicate whether the statement is true or false