Simplify the following text for a Grade 8 native English-speaking person.
Original: The surface of Amalthea is very red ( that is , its reflectivity increases with the wavelength from the green to near-infrared ) . The reddish color may be due to sulfur originating from Io or some other non-ice material .
Simplified: The surface of Amalthea is very red The reddish color may be due to sulfur coming from Io or some other non ice material .