Oxygen is the most abundant. It comprises 49.5% of the total mass of the Earth’s crust, water, and atmosphere. The second most abundant is Silicon (Si) at 27.7% of Earth’s mass. Read the rest of this entry »
What is the most abundant element on Earth?
March 26th, 2008 Dan Posted in Chemistry, Geology 2 Comments »
What is the highest and lowest elevation in the United States?
February 27th, 2008 Admin Posted in Earth Science, Geology No Comments »
At 20,320 feet high, Mt. McKinley in Alaska is the highest point in the United States (as well as all of North America). The highest point in the continental United States is Mt. Whitney in California at 14,494 feet. The lowest point is Death Valley, California at 282 feet below sea level. This is also the lowest point in the western hemisphere. Read the rest of this entry »