Geopatra

  figure(1) minerals Earth Crust :           Earth crust is the outermost thin shell (layer) of the earth. It varies in thickness, being thin under open seas and oceans (8 to 12 km) consists of basaltic rocks which is called Sima (silica and magnesium) and about 60 km under continents consists of granitic rocks which is called Sial (silica and aluminium). The crust’s rocks are igneous, sedimentary, and metamorphic. What is rock? Rocks are naturally occurring collections or aggregates of mineral grains  The branch of geology that studies is called  Petrology. Some rocks consist of only one mineral. For example: limestone composed of mineral called calcite (CaCO3). However, most rocks contain several different kinds of minerals. For Example Granite consists mostly of large crystals of feldspar, quartz, and mica,. Sometimes you can see the mineral grains, and other times they are too small to see without being magnified. Basalt consists mostly of tiny crystals of feldspar and pyroxene. or

  Earth is a unique planet between the solar system at least that is because: Figure(1) Earth. Earth is a unique planet  between the solar system at least that is because : -Earth has a thick atmosphere, which  protect Earth’s residents from harmful UV rays from the sun -Earth"Atmosphere contains enough oxygen that allows it to support life, and it has the perfect amount for fires to burn. - Earth also has large amount of liquid water which play an important role in regulating of earth climate. Earth also has a strong magnetic field that protects it from harmful solar wind and solar flares. Earth is the suitable   distance from the sun. If Earth were farther away, it would be too cold, and all the water would freeze. If Earth were closer, the water would be boiled off. All these factors together allow Earth to be the only planet -that known -that can support life Now let’s  learn  more about the component of our unique planet . Earth’s Different Spheres . Earth as a System consis