Emma N. answered 01/15/21
Experienced Tutor Specializing in Test Prep (SAT/ACT/LSAT) and History
Article III of the Constitution reads that:
"The judicial Power of the United States, shall be vested in one supreme Court, and in such inferior Courts as the Congress may from time to time ordain and establish. The Judges, both of the supreme and inferior Courts, shall hold their Offices during good Behaviour, and shall, at stated Times, receive for their Services, a Compensation, which shall not be diminished during their Continuance in Office."
The Supreme Court can't hear every case, so it's important that there are different levels of the judicial system. These are: trial courts, courts of appeals, and the Supreme Court. Trial and appeals court judges must be chosen by the president and the Senate must approve them. The same is true for the justices of the Supreme Court.
It's important to note that the Constitution only mandated the Supreme Court and not the lower courts. Congress was given the power to create these institutions and chose to do so.
I hope this helps, and please reach out with any questions!