What is the most abundant element on Earth?

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 more…

2 comments - What do you think?  Posted by Dan - 09/17/2010 at 12:13 pm

Categories: Chemistry, Geology   Tags: ,

What is the highest and lowest elevation in the United States?

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 more…

Be the first to comment - What do you think?  Posted by Admin - 08/08/2010 at 9:13 am

Categories: Earth Science, Geology   Tags: ,

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