Categorization and Compound Form

Instructions and help about Categorization And Compound

professor Dave here let's talk about types of matter science stuff professor Dave explains matter is anything that has mass and occupies space it can have many forms we will commonly divide matter into three phases solid liquid and gas we are probably familiar with these terms but let's define them anyway a solid has fixed shape and volume the particles are touching and do not move a liquid has fixed volume but no fixed shape it will mold to its container the particles are still touching but they do move fluidly a gas has no fixed volume or fixed shape it will completely fill its container the particles are far apart moving freely and seldom touch matter will frequently change forms and describing these changes is at the heart of chemistry a physical change is one in which the chemical composition of the substance is unchanged when ice melts water is going from the solid phase to the liquid phase the way the water molecules are arranged changes but they are still water molecules a chem