Mineral (geología)

The video tutorial explains that minerals have a crystalline form and are generated by geological processes. Unlike rocks, minerals have a precise chemical composition. Examples include quartz, made of silicon dioxide, graphite, which is pure carbon, and gypsum, known as calcium sulphate dihydrate.

What is a defining characteristic of minerals that distinguishes them from other geological substances?

• They are man-made.

• They are liquid at room temperature.

• They have a crystalline form.

• They are always metallic.

How do minerals differ from rocks in terms of composition?

• Rocks have a precise chemical composition.

• Minerals are mixtures of rocks.

• Rocks are always crystalline.

• Minerals have a precise chemical composition.

Which of the following is an example of a mineral with a precise chemical composition?

• Quartz

• Granite

• Limestone

• Sandstone

What is the chemical composition of quartz?

• Silicon dioxide

• Sodium chloride

• Calcium carbonate

• Iron oxide

Which mineral is composed entirely of carbon?

• Gypsum

• Calcite

• Quartz

• Graphite