The judicial branch is responsible for interpreting laws and for hearing court cases. These court cases decide if a law has been broken or if a laws is unjust.
The executive branch is responsible for executing, or carrying out, laws. The president of the United States is in charge of this branch and is assisted by his cabinet of advisors.
Congress is the legislative branch. It is responsible for making laws. Congress is made up of two separate chambers: the Senate, and the House of Representatives. Each state is represented in each chamber.