The primary component of the Earth's crust is oxygen, which constitutes about 47% of its composition by weight. This element is a key part of various minerals and rocks found in the crust, such as silicates and oxides. Silicon follows oxygen and accounts for approximately 28% of the crust's composition. Together, these two elements form the basis for a wide range of minerals that are essential to geological processes and the formation of the Earth's landscape. Understanding the composition of the crust is crucial for geology and Earth sciences.