Final answer:
Original jurisdiction is when a court hears a case first, while appellate jurisdiction is when a higher court reviews a decision made by a lower court.
Step-by-step explanation:
Original jurisdiction refers to the power of a court to hear a case first, meaning that it is the first court to hear the case and make a decision. The Supreme Court has original jurisdiction in cases involving ambassadors, public ministers, consuls, and cases to which a state is a party.
Appellate jurisdiction is the power to hear a case on appeal from a lower court. In this role, the Supreme Court reviews decisions made by lower courts and evaluates whether the lower court's decision was correct.
Overall, original jurisdiction is when a court hears a case first, while appellate jurisdiction is when a higher court reviews a decision made by a lower court.