Question

The thickness of Earth’s crust depends upon _______.

Answer 1

if it is continental or oceanic,and the temperature of the outer core and how valcanically active the region is. 
i am 90% sure

Answer 2

Answer: It usually depends upon the rate of weathering and erosion i.e if the rate of sediment erosion is high, then the thickness of the crust will reduce whereas if it is at a very slower rate then the thickness of the crust would almost remain the same.