YEAR 8 SCIENCE REVISION PACK mitochondrion It helps us to breathe Asteroids Rocks Because it is a conductor of heat The gas particles collide with the walls of the bottle which creates a pressure on the inside of the bottle. The temperature of the gas inside the bottle decreases which slows down their movement and reduces the number of collisions with the walls of the container. stellar dust Gas telescope 25 Non-Renewable hydrogen fuel Renewable energy