Question: Sand is less rough then gravel. A skateboard wheel rolling over _____ will become less hot over time (A) sand (B) gravel Do not use A and B to answer the question but instead, choose between "sand" and "gravel".
sand

Question: Tim is playing road hockey with his friends. His dad says they need to get off the road. Tim and his friends try to play on the grass. The puck goes dozens of feet on the road, but barely a tenth that on the grass. That's because the _____ is smoother. (A) road (B) grass Do not use A and B to answer the question but instead, choose between "road" and "grass".
road

Question: Jim's razor can travel further over his skin then over his hair. This means that the razor heats up more when moving over (A) skin or (B) hair Do not use A and B to answer the question but instead, choose between "skin" and "hair".
skin