Force and Motion Science Grade 4

The force that is caused by two surfaces rubbing or touching each other

is....

• friction

• gravity

• electrical force

• magnetic force

The effect of earth’s gravity is stronger towards an object if ....

• the distance of the object to the center of the earth is closer

• there is a strong wind blowing

• the weight of the object is lighter

• the temperature of the object is hotter

The metals that are not attracted by a magnet are....

• Gold

• Steel

• Lead

• Nickel

• Copper

Objects which are thrown upward will always fall back down to the earth.

This is because of ... force.

• gravitational

• elastic

• frictional

• magnetic

An activity that can make an object change shape is ....

• making a pot from clay

• pushing and pulling a table

• stepping on brakes

• hitting a baseball

The direction of friction is....

• the same as the movement of the object

• parallel to the movement of the object

• perpendicular to the movement of the object

• the opposite the movement of the object

The pulling force will be bigger if ....

• the object being pulled is bigger

• the color of the object being pulled is dark

• the object is made from rubber

• the object being pulled is smaller

Write 6 kinds of force!

(don't forget to ss)

One of the ways to lessen friction is by....

• making the surface spiky

• making the surface wavy

• smoothening the surface

• widening the surface of an object

The movement of a bicycle wheel is caused by ... force.

• electric

• gravitational

• elastic

• muscular