What system of government was in place after the United States adopted the U.S. Constitution?

This type of government is made up of independent countries that agree to share power in some areas for the benefit of all of the members. What type of government is this?

Japan and Great Britain have governments in which most of the power is concentrated in the middle of the country. There may be separate regional governments, but they get all of their power and money from the center. What type of government do these countries have?

Canada has a system of government that has a national government that shares powers through a constitution with state/provincial governments. This means it could be considered to be a:

Look at the picture of the European Union flag. It has stars, which represent the independent countries that have joined together to help each member country out in some areas. What type of government does the EU represent?

What type of government is represented by the example below?

Canaada and Great Britain do not have pure federal democracies, which are usually headed by a prime minister. They also do not have three separate branches of government, but instead really have just two! This means their styem is not a federation but is called this?

The first government of the United States had a weak central government. The real political power in the country was actually centered within the individual states. This means the US once had this type of government?

The United Kingdom has a government where political power rests in London. The government then delegates responsibilities to local towns or regional assemblies but full constitutional power rests with the parliament in London. This means the United Kingdom has this system of government?

Germany has a central government along with individual states that share power via a Constitution. The government is divided into three branches and there is also a German President. So Germany would be considered?