Directions(Qs. 41 to 44):Look at the following table and answer the following:The Importance ofRocks and Minerals Name Type of Rock Use Basalt Igneous Used in road building Calcite Mineral Used in cements and mortars. Granite Igneous Used for building, monuments, and tombstones. Marble Metamorphic Used In building, floors, tile in bathrooms. Obsidian Igneous Used in making arrowheads and knives Pumice Igneous Used in scouring, scrubbing, and polishing materials. Quartz Mineral Used in making glass, electrical components, and optical lenses. Sandstone Sedimentary Used in the building industry for house. Slate Metamorphic Used for roofs, chalkboards. Arrange the rocks according to their strength from soft to hardest. A. Slate B. Quartz C. Granite D. Pumice

• A. B, A, D, C   
• B. A, B, C, D     
• C. D, C, B, A                   
• D. C, D, A, B