KS3 Chemistry - BBC Bitesize

Front

What is the particle model of matter?

Back

The particle model explains the differences between solids, liquids, and gases. Particles can be atoms, molecules, or ions and behave differently in each state.

Front

What causes gas pressure?

Back

Gas pressure is caused by particles colliding with the walls of the container.

Front

What are atoms and molecules?

Back

Atoms are the building blocks of everything and can form strong bonds with each other to make molecules.

Front

What is a chemical symbol?

Back

A chemical symbol is a letter or a pair of letters used to represent a chemical element.

Front

What is a pure substance in chemistry?

Back

A pure substance is made of only one type of particle, unlike mixtures which contain multiple substances.

Front

What is diffusion?

Back

Diffusion is the movement of a substance from an area of high concentration to an area of lower concentration.

Front

What is a catalyst?

Back

A catalyst is a substance that speeds up a chemical reaction without being used up in the process.

Front

What is the pH scale?

Back

The pH scale measures how acidic or basic a substance is.

Front

What is the periodic table?

Back

The periodic table is a way of organizing elements based on their properties and atomic weight.

Front

What are ceramics?

Back

Ceramics are materials made from soft substances that become hard and brittle when heated.