Ques:Q: What simple machine consists of two connected rings or cylinders, one inside the other, which both turn in the same direction around a single center point? Choices: - pully - bloom and axle - spoke - wheel and axle A:

Ans:wheel and axle
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Ques:Q: What do you call the daily changes in the level of ocean water? Choices: - waves - shores - currents - tides A:

Ans:tides
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Ques:Q: Three ways that waves may interact with matter are reflection, refraction, and what? Choices: - distortion - absorption - dispose - diffraction A:

Ans:diffraction
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Ques:Q: What code is the same in all living things and shows that all organisms are related by descent from a common ancestor? Choices: - descendant - biochemical - intrinsic - genetic A:

Ans:
genetic
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