inner parts of the earth

The earth is a huge sphere. The surface of which is made up of rock, soil and water. It is surrounded by air. The planet earth is only a tiny part of the universe, but it is the home of human beings and many other living things. Animals and plants live almost everywher..

About AD1600, William Gilbert, who was a court physician of Queen Elizabeth of England, performed certain experiments using spherical lodestones. When he placed small, pivoted magnetic needles at different positions on this sphere, he found that their behavior was quite similar to that of magnetize..

Continents and ocean basins (land beneath the oceans) are part of a rocky 'skin' that surrounds the main body of the earth. This skin is called the earth's crust. The crust of the earth is like the skin around an orange or an apple. The thickness of the crust..

Earth as a Source of Elements - Most elements are formed due to fusion of simple nuclei to give heavier nuclei i.e., nucleosynthesis or nuclear fusion reactions taking place in the stars. Atoms of these elements began to fall together about six billion years ago to form a system, presentl..

Green house gases in the atmosphere behave much like the glass panes in a green house. Green houses are like small glass houses whose transparent glass roof and walls allow sunrays to pass through. It keeps the heat from escaping, thus allowing vegetables and flowers to grow even in cold weather. ..

It is the innermost layer of the eye wall. It is also an opaque and incomplete layer, present inner to choroid. It is also pigmented layer. It consists of the photoreceptor cells, neurons, ganglions and the pigment cells. The neurons are bipolar. Because of the presence of the neurons, t..

Question 1 - Question: The Pollution Control Board has put together a plan to collect used dry cells and hand it over to an authorized industry to recycle them. So, very soon, bright blue and red bins, shaped like dry pen-torch cells will appear in the markets, at petrol bunks, your favourite cinem..

The core consists of two parts: the inner core and outer core. The outer core begins about 2,900 kilometers below the earth's surface. Scientists believe that the outer core is about 2,250 kilometers thick and is made of melted iron and nickel. The temperature of the o..

The atmosphere around earth is a blessing of nature on earth to have permitted the existence of life on it. Earth is endowed with an excellent resource of atmosphere - both to shield it from sun's harsh rays and other ill effects of celestial bodies as well as to provi..

The external ear is separated from the middle ear by a membranous structure called the ear drum or the tympanum. The sound waves striking on the tympanum produce vibrations that are transmitted to the inner parts of the ea..