Which statement correctly describes silicate minerals?

• A. They are the most abundant in Earth’s crust and form from cooling of molten rock
• B. They are only formed in meteorites
• C. They do not occur in nature
• D. They are synthetic materials only

Answer: (A)

Silicate minerals are the most abundant minerals in Earth’s crust because the crust is built mainly from silicon-oxygen tetrahedra that link together in many ways to form a huge family of minerals, including feldspars, quartz, pyroxenes, and micas. When silicate melts from the mantle or crust cool, those tetrahedra crystallize into solid minerals, creating the common igneous rocks like granite and basalt. They occur naturally in rocks all around the planet and aren’t limited to meteorites or synthetic materials. So, describing them as the most abundant minerals and noting that they form from cooling of molten rock captures why they are so fundamental to Earth’s crust.