A piston traps a fixed mass of gas inside a cylinder. The piston is pushed into the cylinder, reducing the volume occupied by the gas. The temperature of the gas is kept constant.
How are the density and the pressure of the gas affected by this change?
Density increases; pressure remains unchanged
Density increases; pressure increases
Density decreases; pressure decreases
Density decreases; pressure increases
321 exam-style questions on CIE IGCSE Physics 2.1 Kinetic particle model of matter, covering 2.1.1 States of matter and changes of state, 2.1.2a Particle structure and motion in solids, liquids and gases, 2.1.2b Gas pressure and particle collisions, 2.1.2c Brownian motion, 2.1.3a The absolute scale of temperature, and 2.1.3b Pressure, volume and temperature of a gas. Each one has a worked solution and a mark scheme showing where the marks go.