Question

read the description below. use the definition of minerals to choose the correct statement about portland cement. portland cement is the most common type of cement used in the world. it is made of limestone and other material. it was first developed in 1756 by john smeaton. portland cement is made through a process of heating and grinding. it sets and hardens when mixed with water. choose one option a portland cement is a mineral because all minerals are made of limestone. b portland cement is a mineral because all minerals harden when mixed with water. c portland is not a mineral because minerals are not man - made. d portland cement is not a mineral because minerals arent used in daily life.

Explanation:

A mineral is a naturally - occurring, inorganic, solid, with a definite chemical composition and ordered internal structure. Portland cement is man - made (through heating and grinding of limestone and other materials). Option A is wrong because not all minerals are made of limestone. Option B is wrong as hardening when mixed with water is not a defining property of minerals. Option D is wrong because many minerals are used in daily life. Option C is correct as minerals are not man - made.

Answer:

C. Portland is not a mineral because minerals are not man - made.