Here's a logic test: Jenny spun her hubcap on both a riverbed and a roof and determined that the roof was rougher than the riverbed. She then wonder if the (A) riverbed or (B) had less friction Choose the answer between "roof" and "riverbed".
riverbed
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Here's a logic test: A train travels at a greater rate of speed while on tracks than while rolling over gravel. This means that the _____ creates more friction (A) tracks (B) gravel Choose the answer between "tracks" and "gravel".
gravel
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Here's a logic test: Mary slid across the wet boat deck wearing her leather-soled slippers, while Sue wearing rubber-soled deck shoes walked with no problem. Mary's shoes had (A) less resistance or (B) more resistance. Choose the answer between "rubber soles" and "leather soles".
rubber soles
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Here's a logic test: A mouse creates less friction running over dirt then running over gravel. The mouse also creates more heat running over (A) gravel (B) dirt Choose the answer between "dirt" and "gravel".
dirt
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