What element is the most abundant in Earth's crust by weight? Sodium Carbon Oxygen Chlorine IDON'T KNOWYET

## Step 1<br />The Earth's crust is the outermost layer of the Earth, and it is composed of a variety of elements. The most abundant element in the Earth's crust by weight is oxygen.<br />## Step 2<br />Oxygen is a major component of the Earth's crust because it is a key component of the most abundant minerals on the Earth's surface, such as silicate minerals.<br />## Step 3<br />Silicate minerals are the primary constituents of rocks and make up the majority of the Earth's crust. Therefore, oxygen is the most abundant element in the Earth's crust by weight.