Exploration of resources, Science

Exploration of resources

Exploration of resources involves complex techniques which depend on the physical, chemical and biological properties of a particular resource. Now-a-days, in our country, much of  the exploration is done by analysis of photographs taken from air raft or spacecraft 9 (satellites)  and other data supplied by the sensors mounted on these vehicle by a method called' remote sensing'. You may  like to know something about the methods used for exploration of  resources.

Conventional Methods: In olden days, discovery of minerals or of petroleum wis purely accidental. People used to know about the hidden treasures of the Earth, when they used to dig out land for water or for construction of houses. Sometimes, while tilling land, fanners  struck luck and discovered precious metals and minerals. However, in this way, they could only hit upon the mineral wealth which lay close  to the surface. Now, many techniques are used for systematic exploration of the hidden resources, and drilling or digging is undertaken when preliminary surveys have clearly indicated what is underneath and how much is likely to be found. 

Remote Sensing Method: Principle Remote sensing is a method of collecting information about ground objects like soil, water, vegetation and minerals, from a remote place, such as an aircraft or a satellite. This technique not only enables us to locate various resources, but also helps us to know about their quantity and quality. The simplest device could be  a camera canied by  an aeroplane  to photograph large areas of land systematically. Television cameras could be mounted on satellites  and they could take pictures showing details of clouds, water, forests or buildings on the earth. Both these are "optical" methods of remote sensing because visible light is used by  the cameras. But one could send out radio waves from the satellites  and observe how they are reflected or absorbed on the surface of the earth. Usually radio waves of wavelengths as small as a few centimetres called 'microwaves',  are used for such studies, because these waves penetrate through klouds and their reflections also go through the clouds to reach the satellite. Similarly,  infra-red signals can be sent from the satellite and reflections studied  to reveal the nature of the reflecting surface. Remote sensing  of water resburces ,  Radio waves of  the shortest known wavelengths are called  'gamma rays'. These are given off by atoms of  several elements. As a result, the ground soil sends out gamma rays which  

Posted Date: 9/28/2012 6:37:42 AM | Location : United States







Related Discussions:- Exploration of resources, Assignment Help, Ask Question on Exploration of resources, Get Answer, Expert's Help, Exploration of resources Discussions

Write discussion on Exploration of resources
Your posts are moderated
Related Questions
Discuss in brief about the Red soils Red soils are characterised  by a rusty red colour due in most cases to the presence of various oxides of iron.  They are either formed  in

describe briefly the scientific and technical achivement of the bronze age

Enumerate in brief about the Earthworms There are several species of earthworms, having slender cylindrical bodies with varying diameters. These organisms ingest the dead organ

Disposal of Chemical Wastes : We shall deal with some commonly occurring chemical wastes. If you need to know more details covering the disposal of a wide range of chemicals, you


Fits : Fits of various kinds may be accompanied by unconsciousness, and are usually characterized by the casualty being unaware of his/her reactions. You should remember the follo

clumping of RBC''s

Maintain the Calcium Levels of Body– Function of Kidney Maintain the body’s calcium levels. Along with parathormone and calcitriol, kidney helps the body to absorb calcium.

Question 1. Explain the mechanism of blood coagulation 2. Which are the different tests done for investigation of a bleeding disorder? Explain any two tests 3. Explain th

Explain Cholecystokinin - Movements of Gall Bladder Cholecystokinin: Active contraction of gall bladder during digestion is due to the hormone cholecystokinin. Acid extracts o