gases
liquids and gases are compressible, which means their volume can be reduced by the application of pressure. gases are more compressible than liquids. solids are not compressible (by hand) to understand, you should first know what kinetic particle theory is: based on the idea that all matter is made of tiny particles. explains the physical properties of matter in terms of movement of particles. can be used to explain how substances change from one state to another melting point: the temperature at which a solid starts to melt, impurities lower the melting point. effect of temperature and pressure on volume of gas. higher pressure, higher the temperature, means more thermal energy, and as thermal energy increases, so does the kinetic energy, which means the movement of particles increases and the volume of the gas will also increase. diffusion: spreading of gas is called diffusion. they diffuse to fill up the space available, and each gas diffuses at a different ra...