NCERT Solutions Class 12 English Vistas Chapter 4 - Journey to the end of the Earth

NCERT Solutions Class 12 English Vistas Chapter 4 - Journey to the end of the Earth

here you can get the NCERT solutions for class 12  English  Vistas chapter 4 Journey to the end of the Earth!  We have Covered the all solutions of  NCERT  textbook English   Vistas Chapter 4.

Solutions Class 12 English Vistas Chapter 4

Journey to the end of the Earth
Page No: 19

Read and Find Out

How do geological phenomena help us to know about the history of



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?


The future of the humankind can get in danger if the emission of carbondioxide and other poisonous gases go on in the same manner. These

gases deplete the ozone layer and allow the ultra-violet 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


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?


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.

2. What are Geoff Green’s reasons for including high school students in

the Students on Ice expedition?


Geoff Green took the high school students to one end of the world, to

provide them the opportunity to develop the respect and understanding

for the earth. He wanted to make the future policy-makers to

experience how difficult it would have been for the earth to sustain life

by rising its temperature. He wanted them to understand that any

interference in nature can cause drastic mishappenings in the future

when the students see the ice shelves melting and collapsing, they can

estimate the kind of environmental troubles ahead in their future.

3. ‘Take care of the small things and the big things will take care of

themselves.’ What is the relevance of this statement in the context of

the Antarctic environment?


This statement has great relevance in the context of the Antarctic

environment. A small change in the environment can give rise to drastic

developments. Antarctica has a small biodiversity. The example of small

grass called phytoplankton can be studied in this context. These

microscopic grasses undergo the process of photosynthesis and serve as

food for number of marine birds and animals. The author says if there is

further depletion of the ozone layer, it will affect the phytoplanktons

and the carbon cycle on the globe. This whole process can jeopardize

the existence of all the marine birds and animals. So if we take care that 

processes carried over by these small grasses are carried out properly,

the bigger animals and birds will fall into the place on their own.

4. Why is Antarctica the place to go to, to understand the earth’s

present, past and future?


Antarctica gives us an idea, how the earth would have been like millions

of years ago and how it got divided into various earth masses. The

melting and colliding ice masses also give us an insight into how our

future is going to be, if we continue with interference in the working of

the nature. Moreover, Antarctica holds into the depths of its ice halfmillion

 year old carbon records, which are helpful in understanding the

past, present and future of the earth. Therefore, Antarctica is the place

which reveals our past, shows our present and visualizes our future.

NCERT Solutions Class 12 English Vistas