Choose between "field" and  "parking lot". Question: Bob buys a new tractor. He drives it around a parking lot before he buys it. Later he is at home in his field driving his tractor in the field. He realizes that the tractor generates more heat while driving over the field. This is because there is less friction (A) on the road (B) in the field.
field
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Choose between "sand" and  "concrete". Question: Evan is riding his bike. He notices that his bike tires get much more warm when he rides his bike in the sand than it does when he rides it on concrete. The tires get hotter on sand because the sand has (A) more friction (B) less friction.
sand
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Choose between "waste basket" and  "recycle bin". Question: Tossing a paper ball into a wastebasket creates more friction then throwing it into a recycle bin. This means that the _____ is more even (A) waste basket (B) recycle bin
recycle bin
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Choose between "door mat" and  "microfiber cloth". Question: A door mat has more resistance then a microfiber cloth. This means rubbing a spatula across a _____ creates less heat (A) microfiber cloth (B) door mat
door mat
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