Choose between "sand" and  "sidewalk". Question: Sally noticed that her scooter moved much slower over sand then over a sidewalk. The _____ has more friction (A) sand (B) sidewalk
sand


Choose between "dry" and  "wet". Question: A truck was doing several test runs on a race track fitted with a sprinkler system on one end of the track to wet the asphalt. The tires of the truck were much warmer before getting to the wet part of the track. That means that friction was higher on the (A) dry part of the track or (B) wet part of the track?
dry


Q: Choose between "chalkboard" and  "brick wall". 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.
A: chalkboard


Question: Choose between "bullet train" and  "car". Question: A traveler wants to go between cities in Japan. She does some research and sees that a bullet train can go much faster than a car. If she wants to spend less time in her trip from city to city, which should she choose? (A) bullet train (B) car.
Answer: bullet train


*Question*
Choose between "Carrie" and  "Dina". Question: Carrie visits Dina at her house. Dina rides her exercise bike while Carrie sits and watches television. Which of the two will have a smaller pool of sweat at their feet when they are done? (A) Carrie (B) Dina.
**Answer**
Carrie


*Question*
Choose between "train" and  "plane". Question: Mike knows that a train is slower then a plane. If he rides both vehicles for 40 minutes, which will have taken him a lesser distance? (A) train (B) plane
**Answer**
train