Question: A truck driving over a flat stretch of road will make _____ than the truck driving over mounds of sand. (A) more heat (B) less heat  Do not use A and B to answer the question but instead, choose between "road" and  "sand".
sand

Question: Dennis is rolling two marbles down the sidewalk. He rolls them both at the same time, in the same way. The blue marble goes a longer distance down the sidewalk than the green one does. The faster marble is (A) green (B) blue  Do not use A and B to answer the question but instead, choose between "blue marble" and  "green marble".
green marble

Question: A tree trunk is thicker then a tree leaf. Which part of the tree is the stronger one? (A) leaf (B) trunk  Do not use A and B to answer the question but instead, choose between "trunk" and  "leaf".
leaf