All about Earth Sciences.
Unit Cell: A unit cell is the smallest repeated portion of a crystal lattice that shows the three-dimensional pattern of the entire crystal. The unit cells are used to define the lengths of various crystallographic axes. When arrays of atoms or molecules are laid out in a space lattice we define a group of such …
Crystallographic axes are the imaginary lines, which we can draw within the crystal lattice. In order to describe the faces and symmetry of crystals, a set of three or four reference axes are established. These imaginary reference axes are established. These imaginary reference lines are called ”crystallographic axes” and are generally taken parallel to the …
Crystallography: The subject of crystallography is included in mineralogy, which discusses crystals and laws that govern their growth, external shape, and interior structure. Very few minerals are crystalline, but most of the minerals are found in crystalline form. When minerals crystallize under favorable conditions, they take the form of crystals. Thus the crystal form of …
In the previous post, we discussed the concept of landslides, their causes, and different types of landslides. Landsliding is the movement of rock, earth, or debris down a sloped section of land. The study of landslides is important because they affect many types of engineering works, particularly highways and railways. Loose rock material ordinarily creeps …
Landslides: When a mass of earth or rock slides down the slope along a definite zone or surface, the movement is called Landslide. The primary factor behind this movement is gravity and is facilitated by moisture, which acts as a lubricating agent. The landslide starts with slow movement along a slip surface, followed by a …
Galaxy: A galaxy is defined as a huge congregation of stars which are held together by the force of gravity. Galaxies numbering millions lie scattered in the Universe like dots. The galaxies are the clusters of stars. These can be spiral galaxies, elliptical galaxies or irregular galaxies. Out of these, the spiral galaxies are large …
Bridges: Bridges form an important part of the transportation rules. They are constructed across the rivers to carry highways and railways. In a country roads and railways often follow the shortest route and therefore, their alignment is determined much before the construction of bridges. As a result, the site of a bridge does not allow …
Introduction to the Universe. Universe may be defined as the collective name of all the known and unknown celestial objects e.g, the solar system, the stars, the galaxies, constellations and all the matter which lies in the space between these objects. According to an estimate, the universe is 10-20 thousand million years old and measures …
Human geography is that branch of Geography which is concerned with the spatial differences and organisation of human activity and its inter-relationships with physical environment. Human geography is separate from physical geography and economic geography. It studies topics like man and his habitat, environmentalism, possiblism, world population, structure of population, migration, world society, culture races, …
The Solar System comprises of the Sun and eight planets (excluding Pluto) which revolve around it in fixed orbits. The Sun is the center of the Solar system. Distanc-wise Mercury is closest to the Sun followed by Venus, Earth, Mars, Jupiter, Saturn, Neptune. Pluto was excluded from the Solar system by the Scientists and was …