| Term | Definition |
| preamble | The introduction to the Constitution. |
| popular sovereignty | The idea that the people rule. |
| separation of powers | Idea that the government should be split up. |
| elastic clause | This give congress the power to make laws "necessary and proper." |
| federalism | Government is divided into delegated, reserved, and concurrent. |
| concurrent powers | Powers shared by national and state government. |
| delegated powers | Powers belonging to national government. |
| reserved powers | Powers belonging to state government. |
| checks and balances | It helps ensure that each branch doesn't get too powerful. |