when a substance in the liquid state is heated, and gas bubbles are formed.

the temperature at which a substance changes from a liquid state to a gas state.

when a substance in the gas state is cooled and changes to a liquid state.

the temperature at which a substance changes from a gas state to a liquid state.

Boiling and condensing

Science

Solid and liquid states

Melting: particle model

Bunsen burners

Melting: melting points and freezing points

Particle model of substances in the gas state

Changes of state: energy and evaporation

In the Solutions unit, pupils will build on their understanding of the states of matter to learn about mixtures, solutions, and dissolving in terms of the particle model.

In Y4 of primary science, pupils learnt about ‘solids, liquids and gases’ and changes of state.

This unit covers the properties of solids, liquids, and gases using the particle model, including gas pressure. It explains changes of state in terms of the particle model while developing skills in using appropriate techniques, apparatus, and materials in lab work.

Solid, liquid, gas states and changes of state

Physical activity and equipment requiring safe use

The temperature at which condensing occurs.

When particles change from the liquid to gas state.

When particles change from the gas to the liquid state.

What happens to the particles of a substance when it condenses?

The volume of a substance {{}} when reaching its boiling point.

The condensing point is higher than the boiling point.

The boiling point is higher than the condensing point.

What is the relationship between the condensing and boiling points of a substance?

Particles start to align in a fixed pattern.

The temperature of the substance decreases.

Select the correct statements that describe what happens during boiling.

They are touching and move over and around each other.

Which of the following statements is true about particles in the gas state?

Put the following states of matter in order of decreasing particle movement.

What laboratory equipment is used to measure the boiling point of a substance?

bigger gas particles as they have expanded

more gas particles that have been created to fill the space

What is in-between the particles in the gas state? 

The temperature of the water reaches it's boiling point.

Place these processes in the correct order as they would occur when heating water.

Starter Quiz