Упр.6 Appendix 2 Chemistry 2020 ГДЗ Enjoy English 11 класс
Read what the blogger and teacher of science, Andrew White, writes about his first lesson in chemistry. Answer the questions after the text.
To be frank I was sort of surprised to see chemistry in my curriculum. Surprised and scared. I’d never studied chemistry and it felt like something boring, theoretical, and very complicated. I was not alone — most of our group shared this attitude but… Mr Eddison converted our ideas having proved how wrong we had been. Mr Eddison is our teacher and he started the course on Basic Chemistry with performing chemistry demonstrations.
Mr Eddison didn’t look like other teachers at all. He entered the classroom, proceeded to the large table in the front, greeted us with a nod, and put on safety goggles and gloves. Needless to say, it captured our attention at once.
Then three beakers appeared on the table. Each of them contained some clear and colourless liquid. The next thing was a large round bottom flask that Mr Eddison proudly placed exactly at the centre of the table. The class became very quiet. We felt really involved but the teacher seemed to have forgotten about our existence — he was carefully pouring the liquids from the two beakers into the large flask. Then he swirled the content of the flask to mix the liquids. Nothing happened. A whisper of disappointment ran round the room but the teacher didn’t cast a glance at us.
He carefully took the third beaker and poured the content into the flask, swirled it again and stepped aside. Nothing was going on. We felt puzzled but still could not take the eyes off the flask. Some time passed and the magic started. The colourless liquid in the flask turned into golden-yellow and then became deep blue. Then — clear again, and then — yellow, like melted amber, and then — rich blue again.
The wonderful transformation lasted for about five minutes. The liquid oscillated between the colours and at last ended in dark-dark blue. Now I know that it is a chemical oscillator reaction, often known as ‘the oscillating clock’. I can easily write down all the chemical equations to explain this transformation. But then, years ago, it looked like a pure magic that enchanted me and sparkled my interest in chemistry.
- Did Andrew White anticipate his first lesson in chemistry to be interesting?
- What did the teacher started the lesson with?
- What chemistry equipment was involved into the demonstration?
- Did the teacher use any protective wear? Do you think that demonstration was potentially dangerous?
- What is Andrew White’s present occupation might be connected with? What makes you think so?
- Could you enumerate the steps the teacher performed to demonstrate the ‘oscillating clock’?
- Have you ever performed or watched any chemistry experiments and demonstrations?
- How do you feel about chemistry as a subject to study? Do you find it boring / complicated / exciting / useful etc?
- What do people find most difficult while studying chemistry?
- No, he didn’t. He was surprised and scared, because he had never studied chemistry before and thought it would be boring and complicated.
- He started the lesson with chemistry demonstrations.
- Three beakers, a large round-bottom flask, and liquids were involved in the demonstration.
- Yes, he did. He put on safety goggles and gloves. Yes, the demonstration was potentially dangerous, because chemistry experiments can be unsafe without proper protection.
- He is probably a chemist, a chemistry teacher, or a science blogger. I think so because he says he can write down all the chemical equations and explains the reaction scientifically.
- First, the teacher entered the classroom and put on safety goggles and gloves. Then he placed three beakers on the table and put a large round-bottom flask in the centre. After that, he poured the liquids from two beakers into the flask, swirled it, added the liquid from the third beaker, swirled it again, and stepped aside to let the reaction happen.
- Yes, I have watched chemistry experiments, and they were very interesting and exciting.
- I think chemistry is useful and interesting, but sometimes it can be complicated because it has many formulas and reactions to remember.
- Most people find it difficult to understand chemical equations, remember formulas, and learn how different substances react with each other.
