1- a situation when you waited for a bus or a train 2- a challenging profession you know about

Talk about a science subject that you studied and liked.
 
You should say:
x
what is was 
x
why you chose it 
x
how can you use it in your life 
and explain what you liked the best about this subject. 
[You will have to talk about the topic for one to two minutes. You have one 
minute to think about what you're going to say. You can make some notes to 
help you if you wish.]
Model Answer 1:
In my school days, I studied chemistry as a subject of science. I liked the 
subject much than any other subjects for some special reasons. In fact, I was 
fascinated with chemistry. It provided me with a great pleasure amid the other 
science subjects.
Chemistry mostly deals with some specific scientific issues like the composition 
and properties of matters, molecules, atoms and crystals, how they change in 
different situations, how chemical reactions take place or what the 
combinations of the matters are and more other related issues. The subject 
also deals with some very special theories and concepts as well. Though it may 
sound simple, the applications are really tough in real-life situations. Besides, a 
student or a researcher needs to struggle a lot over solving the equations and 
bring out a new result. The subject is broad and connected with the other 
fields of science as well.
When I was asked to take three core courses of science, I picked this one as my 
first choice. In fact, I had some idea about chemistry and accordingly wanted to 
apply the ideas to my activities. Besides, I also wanted to know about the 
chemistry facts. The term despite being simple requires hard efforts to come to 

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a solution of the problem. Chemistry is considered as the science of matter. 
And I also wanted to know about the formation of matters. There is another 
reason behind preferring the subject. Once a teacher of mine told me that 
chemistry is everywhere. He suggested me to study chemistry carefully and it 
will reveal the inner mysteries of the world to me. As a result, I became more 
curious than before and wanted to learn the subject. I also wanted to know 
about the matters, energy and how they interacted with each other in 
different situations.
The application of chemistry is interesting in real-life situations. But to 
comprehend the things, one needs to understand the formation of matters, 
atoms, molecules and others. The subject shows the interaction of each matter 
with the others. it also shows how energy emits from its sources and how can 
we get benefitted from the emitted energy in our life in positive aspects. This is 
a fascinating subject and shows the relation of the natural world. The subject 
provides the answers for the things to be odd and unusual. Chemistry explains 
the inner secrets of nature. It tells us why the colours are different, why the 
things are not similar, how an insect can fly or can walk on the water and more 
other questions. When people are aware of such issues, they can take 
necessary steps to get advantage from the situations if they are in need.
Chemistry has a vast area to study. It deals with numerous issues. Hence, it is 
difficult to prefer any specific part of the subject. But I had a preference while 
studying the subject and I found the organic chemistry as the most attractive