| Term | Definition |
| crystalline | breaks evenly |
| amorphous | breaks unevenly |
| crystalline | definite melting point |
| amorphous | no definite melting point |
| crystalline | true solids |
| amorphous | particles are randomly arranged |
| crystalline | particles arranged in regular, repeating patterns |
| crystalline | melts quickly |
| amorphous | melts slowly over a broad range of temperatures |
| crystalline | smooth, flat surfaces |
| amorphous | flows slowly over a long period of time |
| amorphous | wax is an example of this type of solid |
| crystalline | sugar and salt are examples of this kind of solid |