Elements that make up the Earth's crust, as shown in a pie chart.
Diagram showing the composition of the Earth's crust, with a pie chart illustrating the percentages of elements: Oxygen (46.6%), Silicon (27.7%), Aluminum (8.1%), Iron (5.0%), Calcium (3.6%), Sodium (2.8%), Potassium (2.6%), Magnesium (2.1%), and others (1.5%).