The eight most common elements in the earths continental crust are;
1. Oxygen.
2. Silicon.
3. Aluminium.
4. Iron.
5. Calsium.
6. Sodium.
7. Potassium.
8. Magnesium.
Carbon
Mercury.
Carbon
thinner and denser
Quartz and feldspars are the most common silicate minerals of the crust.
Carbon
Carbon
Mercury.
Granite and basalt...... + a bunch of bugs n' stuff
Zinc.
Carbon
Carbon
thinner and denser
17 only
Carbon
continental crust
Oxygen Silicon Sodium Potassium Magnesium Iron