Question: Question: Tommy found that his new hoverboard was faster on the _____ because there was less resistance. (A) sidewalk (B) gravel road  Do not use A and B to answer the question but instead, choose between "sidewalk" and  "gravel road".
Answer: sidewalk

Question: 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.  Do not use A and B to answer the question but instead, choose between "tennis ball" and  "bowling ball".
Answer: tennis ball

Question: 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  Do not use A and B to answer the question but instead, choose between "marble countertop" and  "knitted rug".
Answer:
knitted rug