the judicial branches role is to check other branches and listening to appeals from lower courts.
They can do things that limits the two other branches' powers. For example, if a President vetoes a bill, Congress can override it if they gets a 2/3 vote.
they help congress check the powers of the other two branches
Each branch checks the power of the other branches to make sure that the power is balanced between them.
The division is called 'seperation of powers'. It provides the branches with the ability to 'check and balance' the powers of each other, so no one branch has more power than the other.
Federal courts can "check" the other branches of the federal government and of state governments by
The Judicial Review elevated the Supreme Court to a higher status, balancing the powers of the other branches. Judicial review is an example of check and balances in a modern governmental system.
The separation of powers is the practice we use in the US national government to divide the national government's powers between the three branches (executive, legislative, judicial) so that the national government cannot abuse its powers. Each branch has certain powers and is able to "check" the other branches' powers to keep the three branches equal or "balanced". This system is known as the system of checks and balances and it is used to guarantee the separation of powers.
Because if not is will be not fair rule or law
VETO
The principle by which the power of government are divided among separate branches. In the context of the government of the United States of America, according to the Constitution, the three branches of the government - Executive (President) - Legislative (Congress) - Judicial (the Courts) - each have have their own powers. By separating Powers between branches of government you prevent any individual branch from gaining too much power. Each branch has the ability to be a check on the actions of other branches, this is commonly called a system of checks and balances.
The Constitution limits the powers of government by creating the three branches, executive, judicial and legislature, all of which check the power of each other.