Question: A student slides an eraser over the chalkboard to clean it, then slides the eraser across the brick wall next to the chalkboard. The eraser moves slides faster across the chalkboard than it does the brick wall because the smoother surface is (A) the chalkboard (B) the brick wall. Do not use A and B to answer the question but instead, choose between "chalkboard" and "brick wall".
chalkboard

Question: A soldier is hunkering down with a malnourished child in a foxhole in the middle of a war zone when an enemy grenade rolls between them. The child throws it first, but it barely moves more than a few feet. The soldier scrambles to grab it and chucks it clear across the battlefield, right back at the enemy. The reason it went farther is (A) the soldier has greater strength than the child (B) the child has greater strength than the soldier Do not use A and B to answer the question but instead, choose between "a soldier" and "a malnourished child".
a soldier

Question: Steve notices that when he skateboards over the sidewalk there is less resistance than when he skateboards over the boardwalk at the beach. Steve will move faster when he skateboards over the (A) boardwalk. (B) sidewalk Do not use A and B to answer the question but instead, choose between "sidewalk" and "boardwalk".
boardwalk

Question: Jim is far away from his friend with a flashlight. Jim can see that the light is getting brighter as he (A) walks away from it (B) walks towards it Do not use A and B to answer the question but instead, choose between "walking toward light" and "walking away from light".
walking away from light