A student has gas trapped in a cylinder with a movable piston.
The student slowly pushes the piston down into the cylinder while the temperature of the gas remains constant.
Which of the following correctly describes and explains what happens to the pressure of the gas inside the cylinder?
Pressure increases because gas particles collide with the cylinder walls more frequently
Pressure increases because gas particles collide with the cylinder walls less frequently
Pressure decreases because gas particles collide with the cylinder walls more frequently
Pressure decreases because gas particles collide with the cylinder walls less frequently
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.