Question: Choose between "sidewalk" and  "gravel road". Question: Tommy found that his new hoverboard was faster on the _____ because there was less resistance. (A) sidewalk (B) gravel road
Answer: sidewalk

Question: Choose between "tennis ball" and  "bowling ball". Question: Alice rolls a tennis ball and a bowling ball down a hill.  She notices that the (A) tennis ball (B) bowling ball speeds up faster.
Answer: tennis ball

Question: Choose between "marble countertop" and  "knitted rug". Question: Elizabeth rolled an egg down a marble countertop in the kitchen. She then moved the egg to the knitted rug in the living room. She noticed that the egg moved faster on the countertop than on the rug. On which surface was more heat generated? (A) countertop (B) rug
Answer:
knitted rug