Home > Science > Chemical and material behaviour > Behaviour of matter
What happens to the particles when a piece of rock is heated up?
they get bigger
they get smaller
they stay the same size
What happens to a bar of steel when it is cooled down?
it gets longer
it gets shorter
it stays the same length
What happens to the pressure in a metal spray can when it is heated up?
it stays the same
Why do gases exert a pressure on the walls of their container?
the gas particles hit each other
the gas particles move quickly in all directions
the gas particles hit the container walls
What process causes smelly gases to spread around a room on their own?