# Lesson Worksheet: Friction and Surfaces Science • 3rd Grade

In this worksheet, we will practice defining friction and identifying how the motion of an object is related to the nature of the surface it moves on.

Q1:

The photograph shows a boy sliding down a pole at a park.

He noticed that when he wore gloves on his hands, he slid down the pole faster.

Which statement explains why he slid down faster when he was wearing gloves?

• AThe gloves reduced the amount of friction acting on the pole.
• BThe gloves increased the amount of friction acting on the pole.

Q2:

A class made sliders by gluing coins onto materials they want to test.

They want to find out which materials have the least friction.

How will the children decide which slider has the least friction?

• AThe slider with the most friction will travel the slowest down the slide.
• BThe slider with the least friction will travel the fastest down the slide.

What else could affect the speed at which the sliders slide?

• AThe height of the slide
• BThe weight of the slide

Q3:

Which force acts against gravity to slow down a child going down the slide?

• AGravity
• BFriction

Q4:

Some students are testing different materials to see which would create the most friction when traveling down a slide.

How can they make sure the test is fair?

• ABy making all the sliders from the same material
• BBy making sure each slider has the same number of coins

Q5:

The picture shows children having fun on a water slide.

Water helps the children travel more quickly down the slide.

How does the water affect the amount of friction between the children and the slide?

• AThe water decreases the amount of friction.
• BThe water increases the amount of friction.

Q6:

A class tested different materials to see which one created the most friction when traveling down a slide.

The metal bottle top traveled fastest down the slide. What does this tell the children?

• AThe metal bottle top has the least friction.
• BThe metal bottle top has the most friction.

Q7:

A class made a model of a slide to test which materials would travel fastest down the slide.

Which of the following will their test show?

• AThe less the friction, the slower the speed.
• BThe greater the friction, the greater the speed.
• CFriction does not affect the speed.
• DThe greater the friction, the slower the speed.

Q8:

Why is it easier to move a ball across a smooth, wooden tile than across a piece of sandpaper?

• ABecause a rough surface creates less friction than a smooth surface
• BBecause wood is hotter than sandpaper
• CBecause a wooden tile is shinier than a piece of sandpaper
• DBecause a smooth surface creates less friction than a rough surface

Q9:

Which of the following is a type of force that acts between two touching surfaces?

• AFriction
• BA pull force
• CA push force

Q10:

When you rub your hands together, the friction make your hands .

• Awarmer
• Bcooler

This lesson includes 9 additional questions for subscribers.