Choose between "pavement" and  "grassy yard". Question: Mike discovered that pavement had less friction than a grassy yard when riding his rollerblades spare time. He moved faster over (A) pavement (B) grassy yard
pavement

Choose between "paved path" and  "pebbled path". Question: Morgan rides his bike into town and slowly takes a pebbled path. On the way back, he takes a paved path and the trip is much faster. The trip is faster because the paved path had (A) more friction (B) less friction.
pebbled path

Choose between "living room floor" and  "bathroom floor". Question: A toilet paper roll sliding along a living room floor gets hotter then one sliding across a bathroom floor. Which surface has the most friction? (A) bathroom floor (B) living room floor
bathroom floor

Choose between "gravel" and  "garage floor". Question: A steel bearing falls onto a garage floor. It rolls across the floor and out the door onto the gravel driveway. The bearing produces more heat as it rolls over the gravel. This is because the _____ is more smooth. (A) garage floor (B) gravel driveway

gravel