Q. In comparison to oceanic crust, the continental crust:
- is less dense
- contains higher silica and aluminium
- is more light coloured
Select the correct option from codes given below:
Answer:
1, 2 & 3
Notes:
- Is less dense - Correct. Continental crust has an average density of about 2.7 g/cm3 compared to oceanic crust which is denser at 3.0 g/cm3.
- Contains higher silica and aluminium - Correct. Continental crust is composed of granitic rocks rich in silica and aluminium, while oceanic crust is more basaltic and lower in silica.
- Is more light colored - Correct. The felsic, granitic composition of continental crust gives it a lighter color than the more mafic, basaltic ocean crust.