1. types of crust - continental & oceanic

Question 1

oceanic crust

Answer 1

density: 3 g/cm³
thickness: 5 - 10km
age of rocks: <200 mil
type + appearance: basalt, dark

Question 2

continental crust

Answer 2

density: 2.6 g/cm³
thickness: 35 - 70km
age of rocks: recent - nearly 4 bil
type + appearance: granite, light