Choose between "road" and  "sand". 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
sand

Choose between "blue marble" and  "green marble". 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
green marble

Choose between "trunk" and  "leaf". Question: A tree trunk is thicker then a tree leaf. Which part of the tree is the stronger one? (A) leaf (B) trunk
leaf