Which element is found highest in earth crust?
Which element is found highest in earth crust?
A. Aluminum
B. Silicon
C. Sodium
D. None of the above
A. Aluminum
B. Silicon
C. Sodium
D. None of the above
A. Azotobacter
B. Bacillus
C. Pseudomonas
D. Corey
A. Water
B. Wind
C. Glaciers
D. All of the above
A. Clay content
B. Sodium content
C. Silt content
D. Both A & B
A. Master horizons
B. Transition horizons
C. Little horizons
D. All of the above
A. Pacific ocean
B. Mid-Atlantic ridge
C. Mediterranean sea
D. All the above
A. R, K and S
B. R and K
C. R, K, S and L
D. R, K, S, L, C and P