The three most abundant elements in Earth's crust are
A) oxygen, silicon, and aluminum. B) rock, water, and tectonics.
C) magnesium, potassium, and oxygen. D) iron, aluminum, and granite.
Question 2
Of the elements in Earth's crusts, ________ makes up the most of Earth's crust by weight.
A) oxygen (O) B) silicon (Si) C) Aluminum (Al) D) Iron (Fe)