Simplify the following text for a Grade 7 native English-speaking person.
Original: One chain extends across the sea to Chios , another extends across Euboea to Samos , and a third extends across the Peloponnese and Crete to Rhodes , dividing the Aegean from the Mediterranean .
Simplified: One chain goes across the sea to Chios , another one goes across Euboea to Samos , and a third one goes across the Peloponnese and Crete to Rhodes . This one divides ( splits , cuts ) the Aegean from the Mediterranean .