The earliest (that is, the oldest) stone tools are referred to as:
a. oldowan
b. acheul...
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Aflashlight produces light using energy from the batteries. in which order does the energy change form? a. from chemical to electric to light energy b. from electric to light to chemical energy c. from electric to chemical to light energy d. from light to electric to chemical energy
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The breakdown of food is accomplished by enzymes. a. physical b. chemical c. mechanical d. none of the above
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Why do oceanic plates tend to subduction when colliding with a continental plate
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