Why do iridescent colors seen in some seashells (such as abalone shells) change as the shells are viewed from various positions?

iridescent colors seen in some seashells change as the shells are viewed from various positions because the color shown depends on where your light source is coming from. The color changes as you tilt the shell in different positions, changing where the light source is hitting it.

sadness is not good

explanation:

halogen, any of the six nonmetallic elements that constitute group 17 (group viia) of the periodic table. the halogen elements are fluorine (f), chlorine (cl), bromine (br), iodine (i), astatine (at), and tennessine (ts).