(1) a geologist is a scientist who studies the earth and the elements that form it. (2) the term "rock" (which may sound unscientific) is a scientific term used regularly by geologists. (3) a rock is defined as a combination of minerals and organic material. (4) rocks are classified into three different types: igneous, sedimentary, and metamorphic. (5) each type of rock gets its name from the way in which it was formed. (6) an igneous rock is formed by magma (molten rock) that cools and becomes solid. (7) a sedimentary rock is formed by layers of sediment that settle and harden over time. (8) the meaning of "rock" for a scientist is much more complicated than it is for an average person. 5 which word or words would best begin sentence 8? a. to illustrate, b. at last, c. thus, d. even so,
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Category: chemistry |
Author: Sarah Aksinia
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