Journey to the end of the Earth Class 12 Textbook Questions and Answers CBSE English Chapter 3 NCERT Moments
JOURNEY TO THE END OF THE EARTH
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Answer: Over a period of time crust of earth has undergone several changes. Several phenomena like separation of landmass, rising of mountains and water bodies occurred on the Earth. Earlier the surface of Earth was very warm. It cooled down gradually. Big animals like dinosaurs, mammoths etc. evolved. But these are now extinct. Later human beings evolved on earth.
Thus every major geological phenomenon helps us to understand history of humankind.
Answer: Emission of carbon di-oxide and other harmful gases is increasing. Ozone layer is getting depleted. The natural resources are limited in quantum and its users are increasing. All these could cause the global warming. Increased temperature could melt ice at Antarctica and cause several environmental problems.
Thus indications point out that future of mankind would depend on actions we take now.
Reading with insight
Answer: The study of this region can throw light on global warming and separation of landmasses and water bodies. Within the ice cores of the region, carbon records are hidden. These are millions of years old. We can also understand how dinosaurs, mammoths evolved and became extinct. The region also have evidence on how human beings were evolved on earth.
Thus we can say that geological history is trapped in Antarctica.
Answer: Geoff thinks that the teenagers are future generation of policy makers. They are ready to learn and absorb new things. But the most important aspect is that they are willing to take actions. He believed that understanding about Antarctica and global warming would educate teenagers about an important aspect for sustenance of human beings on earth.
Therefore he decided to include high school students in the expedition.
Answer: Author argues that even a small change in the environment can make a very big impact. He quotes the example of phytoplankton. These are very small algae and grass. But the total ecosystem of Antarctica is dependent on it. The food chain of the region depends on phytoplankton. If by any cause, availability of phytoplankton is disturbed, it will affect life of all animals in the region. Such event may also affect the global carbon cycle.
Thus we need to ensure that small things are intact so that the bigger things are not disturbed.
Answer: At Antarctica we can understand how the Earth would have been in the past. Within the ice cores of the region, carbon records are hidden. These are millions of years old. We can also understand how dinosaurs, mammoths evolved and became extinct.
Through reducing size of glacier and melting of ice we can easily understand that global warming is happening.
One can make a study if the ice mass would finally melt completely. One may make an attempt to predict if that would be end of life on Earth.
Through the carbon records buried under the ice, it could be possible to know about the past and predict about future events.
Thus Antarctica is the place to go to, if we wish to understand the earth’s present, past and future