For the answer to the question above, <span> the geologists must look closely at the physical properties of a mineral. These properties can include the color, streak, hardness, cleavage, specific gravity, crystal form, and others factors.
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Answer:
Geolgic time is measured by observing the changes in the fossils from oldest to youngest sedimentary rocks.
Explanation:
migration rates,birth rates and death rates are all ways to measure changes in the population?
