artificial rock how

The eggs of some normally sexually reproducing animals can be induced by artificial means to develop parthenogenetically. The stimuli inducing artificial parthenogenesis are salts, weak acids, organic solvents, urea, sucrose and physical stimuli like temperature, electric shock ..

Rocks of the Earth - Rocks are polycrystalline solid portions of the earth's crust having a definite texture and mineral content. Usually two or more minerals combine to form different rocks. They are classified ..

When igneous rocks undergo re-crystallization due to the action of heat and pressure under the surface of the earth, metamorphic rocks are formed. Examples: Garnet, Silimanite, Marble, Quartzite e..

, which were formed by packing together of sediment such as, mud and sand. fig. 5.10 - Sedimentary Rocks..

These rocks are formed by direct cooling of the molten material of the earth resulting in crystallization of minerals. Such rocks form the largest portion of the earth's crust e.g., Quartz, Magnetite, Mica, Feldspar and Granit..

. Such series demonstrate as to how various forms of life have changed gradually over a period of millions of years. As a result, the evolution of a number of animals such as horse, camel and elephant, has been clearly understood. Plenty of fossil evidence is now available so as to establ..

Weathering of Rocks - Igneous rocks are composed of alumino-silicates of metals such as iron, calcium, magnesium and sodium. These rocks are continuously exposed to water, CO 2 and humic acids causing carrying away of Na + , Ca 2 + ,Fe 2 + and Mg 2 + ions. The extracte..

The haemodialyzer or artificial kidney is a machine used to filter the blood of a person whose kidneys are damaged. The process is called haemodialysi..

The haemodialyzer or artificial kidney is a machine used to filter the blood of a person whose kidneys are damaged. The process is called haemodialysis. Haemodialysis is defined as the seperation of small molecules from large molecules in a solution by interposing a semipermeable membrane..