NCERT Solutions Class 12 English Vistas Chapter 3 Journey to the End of the Earth. The NCERT solutions for Class 12 English Vistas have been made by English teacher of one of the best CBSE school in India. Vistas in class 12 is an important book with interesting chapters. Its easy to learn and can help to get good marks. These NCERT solutions have been made to give detailed answers and explanations which can be easily understood by the students. You can download the NCERT solutions for free in pdf format. Refer to other links also to download Class 12 English NCERT solutions, worksheets, sample papers and test papers.
Page No: 19 Read and Find Out
1. How do geological phenomena help us to know about the history of humankind?
Answer The geological phenomenon of separating various continents and water bodies from one compact landmass tells us about the age of existence of human race on the earth. Six hundred and fifty million years ago, no human race existed on the earth because the environment was not favourable. After the time when the dinosaurs were wiped out, the Mammals started existing and after the separation of landmass, the human race started flourishing on the earth.
Page No: 20
1. What are the indications for the future of humankind?
Answer The future of the humankind can get in danger if the emission of carbon- dioxide and other poisonous gases go on in the same manner. These gases deplete the ozone layer and allow the ultraviolet rays of the sun to enter the earth’s environment. This causes the rise in temperature of the earth and giving rise to the phenomenon called global warming. Increased temperature can melt the ice of the Antarctica, and cause other environmental problems, thus jeopardizing the future of human kind.
Page No: 23 Reading with Insight
1. ‘The world’s geological history is trapped in Antarctica.’ How is the study of this region useful to us?
Answer The study of this region of Antarctica gives us insight into the world’s geological history. It gives an idea, how the earth was like, before it drifted into continents and countries. It shows how slight changes in the climate can change the shape of the region. It gives the explanation how the climatic conditions of the earth were not favourable for life before and how slowly rising temperature made earth a place to sustain life. All secrets are embedded in the layers of ice in the form of half million year old carbon records.
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