Here's why:
* Low Density: Gas particles have a lot of empty space between them. This means there's room for them to be squeezed closer together.
* Kinetic Energy: Gas particles are constantly moving and colliding with each other. By applying pressure, you can force the particles to collide more frequently and occupy a smaller space.
Examples:
* Pumping up a tire: You compress air into a smaller volume within the tire, increasing the pressure.
* LPG tanks: Liquefied petroleum gas (LPG) is stored in pressurized tanks, reducing its volume significantly.
Note: Compressing a gas will increase its pressure and temperature. This is because the particles are forced to move faster and collide more frequently.