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OxygenOxygen is about 46% of Earth's crust.
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The crust is only what of earths thickness?

half of earths layer


How thick is the earths oceanic crust?

one and a half miles thick


How would you describe the plates that form earths crust rigid or half melted?

rigid


Name the element found in small amounts?

The rarest naturally occurring element is astatine (At), with an estimate of only 25 grams in the earths crust. The rarest man-made element is francium, which has a half life of only 20 minutes, and must be constantly produced in order to be studied.


What is half of the sphere that makes up earths surface?

hemisphere.


What is One half of a spere that makes up the earths surface?

Hemisphere


What element that makes up about half of the alloy known as misch metal?

cerium


Do 10 and a half million more people live in Cairo than in Washington DC?

from two pieces of land colliding together where the earths crust is weak.


What mineral is silicate makes up about half of Earth's crust and is a main component of most rocks?

The mineral silicate that makes up about half of Earth's crust and is a main component of most rocks is known as feldspar. It is a group of rock-forming minerals that are abundant in the Earth's crust and have a wide range of chemical compositions and colors.


What element compromises half earths atmosphere?

Nitrogen compromises half of Earth's atmosphere, with oxygen making up most of the rest. Both nitrogen and oxygen are essential gases for supporting life on Earth.


What is half of the earths surface called?

A hemisphere is one half of the sphere that makes up Earth's surface.


What is the rarest element on earth?

The rarest naturally occurring element on Earth is astatine. It is a radioactive element with a very short half-life, making it extremely rare and difficult to study. It is estimated that there is only a few grams of astatine present in the Earth's crust at any given time.