We care about matter

What is mass?

• the amount of space in an object

• the amount of matter in an object

• the relationship between the space and the matter in an object

What do we use to measure volume?

• digital scales

• scales and weights

• a measuring cylinder

• weights

To find the density of an object, what do we need to know?

• the object's mass

• the object's mass and volume

• the object's mass and weight

• the object's mass and space

Why does a cork float in water?

• because the cork weights less than water

• because the cork has less volume than water

• because the cork's density is lower than that of water

It is a non-contact force that acts at a distance

When a force is applied to an elastic object, the object…

• does not change shape.

• changes shape and then returns to its original shape

• changes shape but does not return to its original shape.

• changes shape forever.

how fast an object moves is...

Rigid objects...

• don't change their shape and break if sufficient force is applied to them.

• go back to their original shape when a force stops acting upon them.

• don't return to their initial shape when a force stops acting upon them.

• don't change their shape and don't break

Which effects can forces have on objects? (Tick more than one option)

• They can make objects start moving.

• They can make objects change colour.

• They can affect their speed and make objects stop moving

• They can make objects change shape.

It is the force that slows down a moving object when it is in contact with another object.