The Senate and the House of Representatives are different because the Senate has the filibuster, where one member can block all activity, and the Senate has a rule that if 60 members agree, debate is stopped and the bill is voted on. The House of Representatives will give each side an equal amount of time for debate before voting on a bill.
The legend, or key, is used to display what stuff means on the map. This makes it easier to spot, rivers, capitols, parks, hospitals and everything else that the map might be centralized upon. Its basically your guide to reading the map and its markings. <span />
