14
 Select the correct answer.
 An avalanche takes place when Ice and snow move down a slope with great speed. What effect does friction have on its rate of movement?
 OA.
 Friction causes the avalanche to move rapidly.
 OB.
 Friction creates a curved surface that decreases the speed.
 OC. The speed of the avalanche decreases with increased friction.
 OD
 The speed of the avalanche increases with increased friction.
 O E.
 Friction does not have any effect on the avalanche.