Edexcel GCSE Combined Science CC2 States of matter and mixtures overview quiz quiz

Far apart and moving quickly

Close together and moving past each other

In a fixed regular pattern, vibrating

Randomly with no forces between them

Melting

Freezing

Condensing

Boiling

Physical changes that can be reversed

Chemical changes that make new substances

Reactions that release a gas

Permanent changes

It melts over a wide range of temperatures

It melts at one fixed temperature

It never melts

It turns straight into a gas

Distillation

Chromatography

Filtration

Crystallisation

Filtration through filter paper to trap the salt

Chromatography using a solvent and paper

Decanting the liquid carefully off the solid

Crystallisation by evaporating the water

Fractional distillation

Simple distillation in a single flask

Filtration through a piece of filter paper

Evaporation of the mixture to dryness

Less soluble in the solvent and far more strongly attracted to the paper

More soluble in the solvent and less attracted to the paper

Always completely colourless on the paper

A pure element rather than a compound

A single element

A compound made of two elements bonded together

Two or more substances not chemically joined

A pure substance

Gas particles are much heavier than the particles in a solid, so they squash down easily

Solid particles move faster than gas particles do

Gases are not made of any particles at all

Gas particles are far apart with space between them, solid particles are touching

They gain energy and vibrate more until they break free from their fixed positions

They lose energy and slow right down until they barely move within the solid at all

They disappear completely as the solid is heated up towards its melting point

They join together to form much larger and heavier particles

Filtration through filter paper

Simple distillation

Chromatography with a solvent

Crystallisation of the salt