Matter - models and explanations

When energy is added to matter, its temperature will rise. The temperature rise will depend on the mass, which in turn depends on its density.

The particle model describes the arrangement of particles in solids, liquids and gases. It can be used to predict changes when matter is heated.

Visualise what happens when states of matter change with this interactive activity designed for the OCR 21st Century GCSE physics specification.

Forces are responsible for changing the motion of objects. If more than one force is present, the shape of an object can also be changed.

Every living thing on Earth is in balance with the pressure of the air or water around it. Pressure helps blood to move around the body and allows organisms to breathe.

The Sun is our nearest star. It is a relatively small star when compared to other stars in the Universe. The Big Bang theory suggests how our Universe was created. The evidence for this is red-shift.

Understanding how to approach exam questions helps boost exam performance. Questions will include multiple choice, descriptions and explanations, using mathematical skills and extended writing.