Here's why:
* Gases are compressible: The molecules in a gas are widely spaced and move freely. When pressure is applied, the molecules are forced closer together, reducing the volume of the gas.
* Gases are expandable: When the pressure on a gas is reduced, the molecules have more space to move around, and the volume of the gas increases.
Examples:
* Air: We compress air in car tires and bicycle pumps.
* Natural gas: Natural gas is compressed for storage and transportation.
* Oxygen: Oxygen is compressed for use in medical equipment and industrial processes.
Important Note: The ease with which a gas can be compressed or expanded depends on its properties, such as temperature and pressure.
