98% of most common crustal igneous rocks are made of ________.
A)oxygen, silicon, aluminum, calcium, sodium, potassium, magnesium, and iron
B)oxygen, hydrogen, nitrogen carbon, and sulfur
C)titanium, manganese, gold, silver, and uranium
D)lithium, cesium, uranium, and rare earths

Question

Quizplus · Accepted Answer

The most common crustal igneous rocks, such as granite and basalt, are composed mainly of oxygen, silicon, aluminum, calcium, sodium, potassium, magnesium, and iron. These elements make up about 98% of the mass of the rocks. Option B includes elements commonly found in organic compounds and option C includes elements that are typically found in trace amounts in rocks. Option D includes elements that are rare in crustal rocks.

98% of Most Common Crustal Igneous Rocks Are Made of ________