earth 2

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 ..

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 rock..

. These currents are supposed to be responsible for the terrestrial magnetic field. This magnetic field appears to enter the earth at the north pole and leaves at the south pole. It should be noted that the magnetic poles do not coincide with the geographic poles. The magnetic poles move ..

The ratio of the mean distance of the Mars from the Sun to the mean distance of the Earth from the Sun is 3 : 2. If the mean distance of the Earth from the Sun is 240 million miles, then what is the mean distance of the Mars from the Sun? => 240 million miles or 300 mi..

Earth is not a perfect sphere, but nearly so, with the approximate surface area 510926783 km 2 . Find the earth's diameter approximately. (Use π = 3.14) => 7198 km or 12756 km or 6378 km or 3189 km..

The earth's magnetic field has an axis which is inclined 20 o west of the axis of rotation of earth. The point where this huge earth's magnet cuts the earth's surface are the magnetic poles. A freely suspended magnet has its north pole pointing towards geogra..

. This warms the Earth's surface and increases its temperature. It starts emitting infra-red radiations of longer wavelengths. The partially radiated infra-red radiations from the Earth are absorbed by CO 2 and green house gases. This restricts the outward flow of infr..

Distribution of various elements in the Earth's crust Water is one of the most abundant compounds on Earth, hence sea water is a vast source of a large number of elements. The Earth's atmosphere contains mainly nitrogen (78%), oxygen (21%), and other gases e.g., CO ..

Magnetism and Matter..

The elements of beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba) and radium (Ra), constitute group 2 of the periodic tabl..