| A | B |
|---|
| changes that do not affect or change the type of matter | physical change |
| changes that do affect or change the type of matter | chemical change |
| properties that cannot be observed without changing the identity or type of matter | chemical property |
| process by which a new substance is formed during a chemical change | chemical reaction |
| what does water do when it freezes | expands |
| what does all matter except water do when it freezes | contracts |
| what does matter do when it is heated | expand |
| what happens to the kinetic energy of the particles of matter when the matter is heated | the particles increase in energy and move faster |
| what happens to the kinetic energy of the particles of matter when the matter gets colder | the particles decrease in energy |
| the total mass before and after a chemical reaction | conservation of mass |
| the total energy before and after a chemical reaction | conservation of energy |
| decreasing this causes the rate of a chemical reaction to decrease or slow down | temperature |
