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!
Extra-terrestrial life:
Just as we have been curious about how life originated on the Earth, we have also tried to explore whether there is life on any other planet in the Solar System or elsewhere in the universe. Explorations of outer space carried out by spacecraft and ground based observatories, in recent years, have led us to the conclusion that in the entire Solar System, the planet Earth is, perhaps, the only place where there is life. The other planets are at such a distance from the Sun that they are either too hot or too cold for life toexist. The one close possibility is the planet Mars. Space probe Viking collected and analysed samples of rock and soil from Mars to detect the presence of life. But so far no conclusive evidence of any life, present or past, has been found on this planet. Man is also looking for life beyond the Solar System. Two approaches are currently available to him; either to send a man or an instrument to a particular star in the Universe and examine local surface for life or to listen to the signals from outer space which may come in the form of radio waves. With our present technology, the first approach does not take us beyond the Solar System.
The second approach is based on the assumption that there may be civilisations technically as advanced or even more advanced than our own. So we can exchange radio messages with them. We have drawn a blank so far on this front. But it is quite possible that our galaxy, the entire system of dust, gases, and stars within which the Sun moves, is already filled with chatter between the far older and more advanced civilisations! These signals may havc been transmitted b) a technique still undiscovered on Earth, so we may be nlissi!?g them altogether! Recently it has been reported that astronomers have found sornc other stars, like our Sun, which have planets. If this is provcd to be true, there may bc millions of planetary systems in the Universe, increasing the likelihood of lifc cxisting on some of them.
Beth ydy cell fur yn wneud. diolch!
Malnutrition and ill health: Are you familiar with the term malnutrition? Malnutrition means either lack of sufficient food or imbalance of nutrients in the diet, resulting in
1. A cyclist ascends a hill of height 120 meters. The mass of cyclist plus bicycle is 100 kilograms. His efficiency is 25%. How many Calories does he burn? 2. A hiker in the Swi
The effect of soil on growing things Get samples of a fertile soil from a flower or vegetable garden, from a wood, from a place where a cellar is life form dug, from a sandy pl
How is our atmosphere different from the atmospheres on Venus and Mars? Earth's atmosphere is different from those of Venus and Mars. This difference lies essentially in their c
What is the momentum of a man weighing 60 kg moving at 50 m/s
Chemical Reactions of Amino Acids The chemical reactions of amino acids can be divided into three classes: i) Reactions of carboxylic group ii) Reactions of amino group
Explain the Inulin Clearance Test Inulin is a complex polysaccharide found in specific plant roots. In the test, a fixed amount of inulin is infused into the blood at a constan
How soap helps water in cleaning Prepare two greasy cloths by smearing kitchen fat or vaseline on cloths. Wash one sample in warm water without soap. Wash the other sample in w
Which is primarily involved in the movement of a glacier: gravity
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