| A | B |
|---|
| Congress | the national legislative body of the U.S. |
| Senate | the upper house of the legislature |
| House of Representatives | the lower legislative branch |
| senators | member of a senate |
| representatives | member of the House of Representatives |
| Supreme Court | the highest court in the U.S. |
| justices | the nine judges of the Supreme Court |
| Pacific Ocean | Lewis and Clark traveled to this ocean |
| Louisiana Purchase | doubled the size of the U.S. |
| Rocky Mountains | Lewis and Clark crossed these to get to the Pacific Ocean |
