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

Question

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

Quizplus · Accepted Answer

Sand is mostly composed of silicon dioxide (SiO2), which is also known as silica. Silica is used to make glass, bricks, and concrete because of its hardness, strength, and resistance to weathering.

Sand Is Composed Mostly of ____ and Is Used to Make