Answer:
[tex]SiO_2[/tex], [tex]Al_2O_3[/tex], [tex]CaO[/tex], [tex]MgO[/tex]
Explanation:
The four most abundant minerals in the continental crust are, [tex]SiO_2[/tex], [tex]Al_2O_3[/tex], [tex]CaO[/tex], [tex]MgO[/tex].
The percentages are
[tex]SiO_2=60.6\%[/tex]
[tex]Al_2O_3=15.9\%[/tex]
[tex]CaO=6.4\%[/tex]
[tex]MgO=4.7\%[/tex]
[tex]SiO_2[/tex] is called quartz
[tex]Al_2O_3[/tex] is called corundum
[tex]CaO[/tex] is called calcium oxide or quick lime
[tex]MgO[/tex] is called magnesium oxide or magnesia
