The Senate is called a continuous body because the reelection of members is timed so that no more than one-third of the members change in an election period. In other words, the Senate is broken up into three equal groups, and only one-third of the senate faces reelection every two years. All members of the senate are elected to six-year terms.
The Senate is different from the House of Representatives because all states are equally represented. Two senators from each state are elected based on popular vote. In addition to creating federal laws, members of the Senate confirm the president's nominees for federal offices and judgeships.
The Senate was established following what is known as the Great Compromise. In 1787, state delegates gathered at the Constitutional Convention to decide how states should be represented in the lawmaking process. Several different plans were proposed, but ultimately, it was decided that Congress would have two chambers. This led to the establishment of the House of Representatives and the Senate.
This was called the Great Compromise because larger and smaller states both had to compromise on the issue of state representation. States are represented in the House of Representatives according to population size. So, smaller states have less representation than larger states. However, states are equally represented in the Senate.