Final answer:
Supreme Court justices serve for life and are appointed by the President and confirmed by the Senate.
Step-by-step explanation:
Supreme Court justices serve for life or until they choose to retire. The appointment process begins with the President nominating a candidate, who is then confirmed by the Senate. Once confirmed, they can serve on the Supreme Court for as long as they want, as long as they maintain good behavior.
Learn more about Supreme Court Justice terms and appointment process