Heavy

The Earth weighs 6 sextillion, 588 quintillion tons, give or take a few pounds. According to The Handy Science Answer Book, "This is calculated from using the parameters of an ellipsoid adopted by the International Astronomical Union in 1964 and recognized by the International Union of Geodesy and Geophysics in 1967."

They never tell you, with shoes or without?

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Stand closer

There are 1.4 parts of fluoride to every million parts of ocean water. That's why you hardly ever see a shark with cavities. You don't believe me? Well don't take my word for it...

Earth's oceans contain over a quadrillion acre-feet of water. But of course, the most desirable acreage has a land view...

Both from source: THE HANDY SCIENCE ANSWER BOOK