What does friction usually do to a moving object?, Makes it invisible, Slows it down, Changes it into gas, Makes it lighter, Which surface has the most friction?, Ice, Smooth glass, Sandpaper, Wet floor, Which example shows static friction?, A ball rolling, A box staying on a slope, A pencil sliding, A car moving, Which example shows kinetic friction?, A book sliding on a table, A cup staying in your hand, A chair not moving, A parked car, Why do car tires need friction?, To make the car heavier, To help the car grip the road, To make the road smooth, To stop the engine, What can reduce friction?, Oil, Sandpaper, Rough shoes, Dry ground, Friction acts in which direction?, The same direction as motion, Opposite the motion, Up only, Down only, Why is walking on ice difficult?, There is too much friction, Ice is very heavy, Shoes become bigger, There is too little friction, Which object will likely stop faster?, A toy car on grass, A toy car on smooth tiles, A toy car on ice, A toy car on glass, Why do we use rubber on shoe soles?, To make shoes heavier, To reduce friction, To increase grip, To make the floor smoother, Which situation has the least friction?, Walking on a dry road, Sliding on ice, Running on grass, Holding a pencil, Which action uses friction to produce heat?, Opening a book, Drinking water, Turning on a light, Rubbing hands together, If a box is sliding to the left, friction acts _____., upward only, to the left, to the right, downward only, What type of friction acts when a chair is dragged across the floor?, Kinetic friction, Magnetic force, Static friction, Gravity only, What type of friction acts when a book is not moving on a tilted desk?, Static friction, Kinetic friction, Air friction only, No friction

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