These finishes most often referred to as urethanes or polyurethane's remain on the surface of the wood and form a protective coating. They are generally available in high-gloss, semi-gloss, satin and matte.
So, as you can see, the difference between Congress and Senate is quite simple. Congress is the legislative branch of the government. It has two parts; the Senate and the House of Representatives. So, the Senate is a part of the congress.
The three branches are the legislative branch, the executive branch and the judicial branch. The United States Congress heads our legislative branch. This branch serves mainly to make laws. The United States president heads our executive branch.