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.
how is it
The buoyancy of water Find a metal can like a coffee can or a cigarette tin which has a tightly fitting cover. With the cover on, push the can into a pail of water, cover end d
1. What is the Solar Neutrino problem, and what are the possible resolutions of it? Which of these resolutions is now believed to be the most likely explanation? 2.What is the m
FIRE HAZARDS IN THE LABORATORY : The average science laboratory is a particularly hazardous area when it comes to fire. Flammable liquids, compressed and liquefied gases, hazard
Ligases (synthetases) These enzymes (code EC 6) catalyze the linkage of two molecules coupled with the hydrolytic breakdown of a pyrophosphate bond in ATP or an analogous co
Q. What are the different states in which water is found during the water cycle? During the water cycle, water is found in solid state (snow, ice, etc.), liquid state (ground wa
Explain Internal Defence Mechanism Body's internal defence mechanism is carried out by white blood corpuscles (WBCs), macrophages, inflammatory reactions, fever, interferons, c
if the moon is 240000 miles from earth how far is that in scientific notation.
Q.What is the greenhouse effect? Some gases like carbon dioxide, methane, nitrous oxide prevent the escape of heat from the Earth's surface by trapping it. This increases the av
What is ablation? Ans) Ablation is a technological term for the loss of snow and ice from a glacier. The process happens by a combination of the two physical processes, meltin
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