Events and States are differentiated below -
| Events | States |
| Anything that happen in time | Shows the attributes values of object at a particular point in time |
| An event separate two states | A state separates two events |
| An event is said to have happened without regard to whether it changes a state or not | A state is said to have changed only if the event fired on the object changes some attribute value of the object |
| Are represented by labels over the directed arcs that connect the states with attributes within brackets | Are represented as rounded rectangle and the state name is added as a label name inside the rectangle. |