Simplify the following text for a Grade 8 native English-speaking person.
Original: Five of the islands are inhabited : Baltra , Floreana , Isabela , San Cristobal and Santa Cruz .
Simplified: People live on only 5 of the 19 islands of the GalÃ pagos : Baltra , Floreana , Isabela , San Cristobal and Santa Cruz .