Choose between "mahogany" and  "birch". Question: Mary learned recently that mahogany is rougher than birch. This means that when she rubs her sandpaper over the _____ more friction is experienced (A) mahogany or the (B) birc
mahogany

Choose between "Son" and  "Father". Question: A father and his 8 year old son were having a rock throwing competition to see who can throw it the farthest. The son lost the competition because (A) he is weaker (B) he is stronger
Son

Choose between "classroom desk" and  "home office desk". Question: A stick of gum that is slid across a classroom desk travels pretty slow compared to a stick of gum that is pushed across a home office desk. Which surface is the most rough? (A) classroom desk (B) home office desk
classroom desk