2 What is the most common group of minerals in the Earth's crust? A Silicates B Carbonates C Oxides D Sulfides
7 What is the second most abundant element in the Earth's crust? A Silicon B Aluminum C Oxygen D Iron
9 How are sedimentary rocks formed? A By cooling of magma B By compaction and cementation of sediments C By heat and pressure on existing rocks D By volcanic activity
10 How are metamorphic rocks formed? A By cooling of lava B By compaction of sediments C By heat and pressure acting on existing rocks D By erosion
11 How are igneous rocks formed? A By the cooling and solidification of magma or lava B By the compaction and cementation of sediments C By the alteration of existing rocks due to heat and pressure D By the weathering of rocks
13 What is the process by which weathered material is transported? A Weathering B Erosion C Deposition D Lithification
16 What are the three main types of rocks? A Igneous, sedimentary, metamorphic B Granite, basalt, limestone C Hard, soft, medium D Volcanic, sedimentary, organic
17 What scale is used to measure the hardness of minerals? A Richter scale B Mohs scale C Celsius scale D Fahrenheit scale
18 What is a gemstone? A A precious or semiprecious mineral used for jewelry B A type of rock C A fossil D A type of soil
19 What is the tendency of a mineral to break unevenly called? A Cleavage B Fracture C Streak D Luster
20 In which type of rock are fossils mostly found? A Igneous rocks B Metamorphic rocks C Sedimentary rocks D All rocks equally
21 What is a fossil? A A preserved remnant or trace of an organism B A type of mineral C A kind of rock D A type of magma
24 What is the rock cycle? A The continuous process of rock formation, change, and transformation B A cycle of erosion only C The process of mineral extraction D The movement of tectonic plates