The density of an object is calculated by dividing the mass by the volume. Find out more with BBC Bitesize. For students between the ages of 11 and 14.

Now, a new paper in Nature Physics provides some answers. It’s astonishing how complex water is considering it’s made up of just two elements, and its molecules consist of just three atoms.

Revise density of materials for your physics GCSE foundation and higher triple science exams with Bitesize interactive practice quizzes covering feedback and common errors.

Volume is a measure of the amount of space an object takes up. When a cylinder is submerged in the water it pushes water out of the way. If you measure the amount the water level increases, you can ...