Sandstone is a ________________? i. sedimentary rock ii. aqueous rock iii. silicious rock The correct answer is: A. only (i) B. both (i) and (ii) C. both (i) and (iii)D. all (i), (ii) and (iii)

Gypsum is a_________________? A. mechanically formed sedimentary rock B. igneous rockC. chemically precipitated sedimentary rock D. metamorphic rock