Solid objects diffuse light.

Atoms are made up of protons, neutrons and electrons.

Glass has a smooth surface and is used to make mirrors.

Electrons move in orbits around the nucleus of an atom.

A mixture cannot be separated into its original components.

A solution is a heterogeneous mixture.

In a heterogeneous mixture, we can easily see the different components.

Seawater is an example of a solution.

In a homogenenous mixture, the colour and texture of a mixture are consistent.

In which method of separation does a mixture pass through a filter?

In which method of separation is a liquid first evaporated and then condensed?

Which method of separation is used to separate a soluble solid from a non-soluble solid?

What method of separation is used to separate alcohol from water?

What method of separation is best to separate the components of a solution?

What type of chemical reaction is combustion?

What do atoms form in a chemical reaction?

What does the fire need in order to burn?

What's the name for wood or coal when we burn it?

What gas is often produced during combustion and is a cause of global warming?

Which reaction causes an apple to turn brown?

Which reaction converts the carbohydrates in milk into lactic acid?

Which reaction can cause metal to turn red-brown and become brittle?

Which reaction converts sugar to alcohol to make wine?

In which reaction do oxygen atoms gain electrons from other substances?