what is a material that makes up earth's hard outer surface?

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what is a material that makes up earth's hard outer surface?

2007-01-15 16:22:33 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Earth Sciences & Geology

4 answers

The earth's crust is made mostly of oxides: silica, alumina, iron , lime, magnesia, potash and soda.

http://en.wikipedia.org/wiki/Earth%27s_crust#Composition_of_the_crust

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2007-01-15 16:27:48 · answer #1 · answered by Jerry P 6 · 1⤊ 0⤋

Rock.

2007-01-15 16:25:38 · answer #2 · answered by Anonymous · 0⤊ 0⤋

The most abundant mineral on earth crust are silicate minerals (SiO4 with other elements). They include things like quartz and feldspar.

2007-01-15 16:41:33 · answer #3 · answered by Ms. K. 3 · 0⤊ 1⤋

Rocks. and dirt. yea.

2007-01-15 16:28:29 · answer #4 · answered by Anonymous · 0⤊ 0⤋