Mineral (chemistry)

The video explains that minerals are naturally occurring substances with a crystalline form, produced by geological processes, and have a precise chemical composition. Unlike rocks, which are mixtures of various minerals, minerals are distinct in their composition. Examples provided include quartz, composed of silicon dioxide, graphite, which is pure carbon, and gypsum, a form of calcium sulfate.

What is a defining characteristic of minerals?

• They are man-made.

• They are always metallic.

• They have a crystalline form.

• They are liquid at room temperature.

How do minerals differ from rocks?

• Minerals have a precise chemical composition.

• Rocks are always crystalline.

• Minerals are mixtures of rocks.

• Rocks have a precise chemical composition.

Which of the following is an example of a mineral composed of silicon dioxide?

• Calcium sulphate

• Graphite

• Gypsum

• Quartz

What is the primary element in graphite?

• Carbon

• Silicon

• Calcium

• Sulphur

Which mineral is mentioned as being a form of calcium sulphate?

• Silicon dioxide

• Quartz

• Gypsum

• Graphite