How have prehistoric artifacts helped us to understand prehistoric cultures?
What will be an ideal response?
Anthropologists have collected and studied prehistoric objects made by prehistoric humans for practical purposes and, from these objects, have been able to fi gure out two important features of their culture: the
tools they made/used and what their sources of power were.
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In the accompanying figure, what happens when power is applied to the stator?
What will be an ideal response?
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Scabies is caused by _____
a. a burrowing mite b. an allergic reaction c. pinworms d. flea infestations
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A common ____________________ is effective for drying out electrical systems that may have been
affected by pressure washing.
Fill in the blank(s) with the appropriate word(s).
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In what year were genetically engineered crops first introduced?
a. 1991 c. 1996 b. 1993 d. 1998
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