Q: Choose between "dry floor" and "wet floor". Question: Sliding boots across a dry floor makes them heat up less then sliding them across a wet floor. This means that the _____ is smoother (A) wet floor (B) dry floor
A: wet floor

Q: Choose between "Earth" and "Ceres". Question: Major Tom, an astronaut, used to jump up and down on Earth, and he never got higher than a meter in the air. When his ship landed on Ceres, he jumped up and kept going and going higher and higher. Why? (A) Earth has greater mass (B) Ceres has greater mass
A: Earth

Q: Choose between "Someone in the same room" and "Someone down the street". Question: Who would it be easier to hear if they were both talking at the same volume (A) a person down the street. (B) a person in the same room or
A: Someone down the street

Q: Choose between "icy sidewalk" and "dry sidewalk". Question: Carl is walking to school and he takes the sidewalk. Where the sidewalk is dry, Carl walks easily. Where there is icy sidewalk, Carl's shoes slip and he starts to fall. Carl's shoes slip on the icy sidewalk because it has (A) less friction (B) more friction.
A: icy sidewalk