Question

the vast majority of the minerals that make up the rocks of earths crust belong to the silicate group of minerals. quartz is a silicate and the most abundant mineral in earths crust. based on the chart, what conclusion can you draw regarding the composition of quartz?
no conclusion can be drawn.
quartz is made of iron and aluminum.
quartz is made of oxygen and silicon.

Explanation:

Step1: Analyze the composition of quartz

Quartz is a silicate mineral. Silicate minerals are composed of silicon and oxygen.

Step2: Check the pie - chart for silicon and oxygen

From the pie - chart, oxygen is \(47\%\) and silicon is \(28\%\) of the Earth's crust.

Answer:

Quartz is made of oxygen and silicon.