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Essay text:
The Crust
The outside of the earth is a thin crust which is approximately 20 to 40km
thick. The crust is a formation of dips and hollows which are filled with water
to form the oceans and seas. On top of the earth's crust is an atmosphere, this
is a thin layer of gases, 95% of these gases are within the first 20km of the
earth's surface. Of the 17 elements that make up 99.5%, the most abundant of
these are Oxygen 49.2%, Silicon 25%, and Aluminum 7.5%. Then the next most
abundant elements are Iron 4.7%, Calcium 3.4%, Sodium 2.6%, Potassium 2.4%,
Magnesium 1.9%, Hydrogen 0.9%, titanium 0...
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Common topics in this essay:
- Biology, The Five Major Compounds
- Oxygen And Carbon Dioxide
- An investigation to see how much oxygen is given off when different concentrations of catalase are added with hydrogen peroxide.
- Chemical Reactions of Copper compounds
- Classification Tests On Organic Compounds
- Concentration Affects The Rate Of Oxygen Production When Raw Liver (Catalyse), And Hydrogen Peroxide Is Mixed
- Differences Between Ionic and Covalent Compounds
- Elements and their compounds
- Identifying 3 Unkown Compounds (Physical Properties of Ionic and Molecular Solids)
- Identifying Organic Compounds Lab Report
- Organic Compounds Lab Report
- PROTEINS,CARBOHYDRATES,LIPIDS
- Separation of Acid, Base and Neutral Compounds from a Solid Mixture by Liquid-Liquid Extraction
- Separation of three compounds
- The Comparative Abundance Of The Elements
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