Year 7 Revision Quiz

1 cm³ of gold has a mass of 19.3g.
1 cm³ of aluminium has a mass of 2.7g.
One reason for this is that the particles in gold are:

• heavier than those in aluminium
• lighter than those in aluminium
• further apart than those in aluminium
• larger than those in aluminium

What type of substance is represented by the picture?

• Solid
• Liquid
• Gas
• Solution

This image is clearly a liquid because.....

• it is H₂O
• the molecules are far apart and moving
• the particles can move and are close together
• the particles are vibrating in a fixed position

The image could not be.....

• pure water
• an impure liquid
• a gas dissolved in water
• a salt solution

The force (pressure) of a gas or liquid on a solid is due to:

• moving particles hitting each other
• stationary particles in the surface of the solid
• moving particles hitting the surface of the solid
• stationary particles resting on each other

A liquid is heated. Why does the hot liquid occupy a larger volume than a cold liquid?

• the particles are closer together in a hot liquid
• the particles are moving about slower in a hot liquid
• the particles are further apart in a hot liquid
• the particles are smaller in a hot liquid

Who is right?

• James and Jersinda but not Jessica
• James and Jessica but not Jersinda
• Jessica and Jersinda but not James
• All three of them

Dalton said that gnats flying about in the air gave him the idea of what a gas was. What type of movement by the gnats was Dalton referring to?

• fast, smooth flight
• slow, smooth flight
• fast, erratic flight
• slow, erratic flight

The diagrams show the different states of matter. What is the correct sequence for a gas cooling?

• A
• B
• C
• D

Look at the picture. When air is pumped out of the can its walls collapse inwards.
This happened because the number of particles hitting the outside of the walls is:

• greater than the number hitting the inside walls
• the same as the number hitting the inside
• less than the number hitting the inside
• almost none!