Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Earth
How do we describe the 'big ball' on which we live? Seen from space, it appears as a bluish-white sphere. Its wealth of plant and animal life, snow covered peaks, blue oceans and white clouds make the Earth a beautiful planet. Human beings have explored it extensively. Yet, the first hand knowledge of the Earth is limited to a thin shell of rock and water extending to a few kilometres below the surface, and to the atmosphere above. However, using indirect methods, such as the study of waves generated during earthquakes, scientists have been able to picture the Earth's interior. without ever seeing or sampling it. We will now briefly describe the current scientific knowledge about the Earth.
The Earth's atmosphere has been studied extensively with the help of ground based experiments, aircraft, rockets and balloons. Though it is not divided into distinct layers, it-is helpful to think of the atmosphere in this way. The troposphere, nearest to the surface, is made up of 78 per cent nitrogen and 21 per cent oxygen, with water vapour, carbon dioxide, neon and argon making up most of the remaining one per cent. It has an average temperature of about 16°C at sea level and- 16OC near its top. The stratosphere, coming next contains ozone and has a temperature ranging from - 16OC to -4OC. This ozone layer absorbs the harmful UV radiations fron, the Sun, thus protecting us from them. The carbon dioxide in the Earth's atmosphere traps heat and makes it warmer through the greenhouse effect. Were it not for this, the Earth's surface temperature would be much lower and it would always be covered with ice.
ht are the examples oof a solution and its characteristics?
Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4
Health food online store In today's world when almost everything has become easy with just a click on the mouse, even shopping for normal groceries has been revolutionized by m
What is loam soil? This is a type of soil, which is halfway among clay and sandy soils.
Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4
Explain the Ventricular Fibrillation This is a fatal condition in which the heart beats like a bag of worms and the patient may die in a couple of hours, if the action is not t
Burns : There are two types of burns which we are to discuss: 1) Chemical 2) Thermal Chemical burns have already been discussed in Sec. 16.7; so we shall discuss thermal
Making a precision reflecting telescope It is fairly beyond the scope of this book to include the intricate details for mirror grinding and testing. Though, some teachers may w
Media and Educational Environment: Some recent technological developments in media, have opened up new horizons. Besides, increasing use of media, to support and expand educa
For the model of Fall River and Butte Creek in HEC-RAS, (a) Output the cross-section of all three flood events for station 9.8 on one figure. Include only the water surface and
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd