Sand is composed mostly of ____ and is used to make glass, bricks, and concrete for the construction of roads and buildings. A) shells, skeletons, and other remains of dead aquatic organisms B) aluminum C) phosphate salts D) silicon dioxide (SiO₂) E) calcium carbonate, or CaCO₃

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Quizplus · Accepted Answer

Sand is mostly composed of silicon dioxide (SiO2), also known as quartz. It is a common mineral found in many types of rocks and is used in a variety of construction materials such as glass, bricks, and concrete. Shells, skeletons, and other remains of dead aquatic organisms can contribute to the formation of sand in certain areas, but they are not the primary component. Aluminum and phosphate salts are not commonly found in sand. Calcium carbonate is another type of mineral that can form sand, but it is not as common as quartz.

Sand Is Composed Mostly of ____ and Is Used to Make