پادکست British Council سطح B2 شماره ۴ :A lecture about an experiment

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تمرین آمادگی

جملات زیر را با شکل صحیح کلمات داخل پرانتز کامل کن: (جواب تمرین در انتهای صفحه)

Pitch is the name (1)……………………………… (give) to a black substance that can be manufactured
from petroleum, coal tar or plants. It was (2)……………………………… (original) used in road
(3)……………………………… (construct), boat- (4)……………………………… (build) and waterproofing roofs. It is
known for its viscosity (being semi-fluid), its (5)……………………………… (sticky) and its
(6)……………………………… (elastic). In fact, pitch is the world’s (7)……………………………… (thick) known fluid.
An experiment to let drops of pitch form and then fall has been going for 92 years
without (8)……………………………… (interrupt)

حالا به پادکست گوش کن. در این قسمت قراره به یک ارائه درمورد یک آزمایش گوش بدی. با گوش دادن به پادکست هم می تونی مهارت شنیداریت رو تقویت کنی و هم کلی عبارت و کلمه ی کاربردی یاد بگیری.

British Council – Upper Intermediate:A lecture about an experiment

پادکست British Council سطح B2 شماره 4

متن پادکست:

In today’s lecture we’re going to be talking about experiments, and I thought it might be interesting for you all to learn about the world’s oldest continuously running laboratory experiment that is still going today. In fact, it holds the Guinness World Record for being the longest-running experiment. This experiment began in 1927 and has been going ever since.

It’s called the ‘pitch drop’ experiment and it was created by Professor Thomas Parnell at the University of Queensland, Australia. Parnell was the university’s first physics professor, and he wanted to show in this experiment that everyday materials, such as pitch, can have quite surprising properties.

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You see, when pitch is at room temperature, it feels solid. You can easily break it with a hammer. However, it isn’t in fact solid. At room temperature, pitch is many billions of times more viscous than water, but it’s actually fluid.

In 1927, Professor Parnell took a sample of pitch. He heated it and poured it into a glass funnel. He allowed the pitch to cool and settle – for three years. He then turned the funnel upside down and cut the top off it.

Since then, the pitch has slowly dropped out of the funnel. How slowly? Well, the first drop took eight years to fall. It took another forty years for another five drops to fall. Today it’s been almost 90 years since the experiment started. Only nine drops have fallen from the funnel. The last drop fell in April 2014 and the next one is expected to fall in the 2020s.

The experiment has a tragic story associated with it. Professor Parnell died without seeing a pitch drop. His replacement, Professor John Mainstone, became responsible for the pitch drop experiment from 1961. He held the job for 52 years, and missed seeing the drop fall three times – by a day in 1977, by just five minutes in 1988 and finally in 2000, when the webcam that was recording the experiment suffered a power outage for 20 minutes, during which time the pitch dropped.

The pitch drop experiment is something we can all participate in now. There’s a live web stream that allows anyone to watch the glass funnel and wait for the fateful moment. A similar experiment to the Queensland pitch drop was set up in Dublin, and the video of the moment the pitch actually dropped went viral on the internet. It’s interesting to see how a very slow event can spread news so quickly.

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حالا به سوالات زیر جواب بده:

تسک ۱

جواب درست را انتخاب کن:

۱)The pitch drop experiment is …
a. the oldest experiment in history.
b. the oldest experiment that is still running today.
c. the longest experiment in 1927.

۲) The creator of the experiment wanted to …
a. have an experiment that lasted a long time.
b. show the dangers of everyday materials.
c. show that common substances have extraordinary properties.

۳)Pitch is a substance …
a. that looks solid but is actually liquid.
b. that looks liquid but is actually solid.
c. that doesn’t appear to be liquid or solid.

۴) The first time a drop of pitch fell was …
a. eight years after the experiment began.
b. three years after the experiment began.
c. forty years after the experiment began

۵) Which of the following sentences is not true about Professor John Mainstone?
a. He never saw the pitch drop.
b. He was responsible for the experiment for over fifty years.
c. He took over the experiment in 1927.

۶) In the year 2000, …
a. an electricity failure meant the pitch drop was not filmed.
b. scientists set up a live stream of the experiment.
c. the ninth drop of pitch fell.

تسک ۲

جملات زیر را با یک یا چند کلمه کامل کن:

۱) When pitch is at room temperature, you can break it ……………………………… .

۲) Professor Parnell put pitch into a glass funnel, let it cool, then turned it …………… and cut off the top.

۳)In total, only ……………………………… have fallen from the funnel.

۴) The next pitch drop is expected to fall in ……………………………… .

۵) In 1988, the scientist responsible for the experiment missed seeing the pitch drop
by ……………………………… .

۶) The speaker notes it’s interesting how news about a slow experiment can
spread ……………………………… .

جواب ها

۱٫ given

۲٫ originally

۳٫ construction

۴٫ building

۵٫stickiness

۶٫elasticity

۷٫thickest

۸٫interruption

تسک ۱

۱٫ b

۲٫ c

۳٫ a

۴٫ a

۵٫c

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۶٫a

تسک ۲

۱٫ with a hammer / easily

۲٫ upside down

۳٫ nine drops / 9 drops

۴٫ the 2020s.

۵٫five minutes / 5 minutes

۶٫ quickly / fast / so quickly / so fast / very quickly / very fast

امیدوارم از پادکست British Council سطح B2 شماره ۴ لذت برده باشید. برای دسترسی به قسمت های دیگر این پادکست می توانید از صفحه ی پادکست British Council آکادمی مجازی آموزش زبان ۲۴talk دیدن کنید.

همچنین برای گوش دادن به پادکست های BBC می توانید به صفحه ی پادکست ۶ دقیقه انگلیسی (BBC) آکادمی مجازی آموزش زبان ۲۴talk مراجعه کنید.

گوش دادن به پادکست روش خوبی برای تقویت مهارت شنیداری و هم چنین یادگرفتن کلمات در بستر یک موضوع خاصه که این به تقویت مهارت مکالمه انگلیسی نیز کمک زیادی می کنه.

اگه دنبال این هستی که مهارت های مکالمه زبان انگلیسیت رو بیشتر از این تقویت کنی بهت پیشنهاد میکنم در دوره‌ی مکالمه زبان انگلیسی آکادمی مجازی آموزش زبان انگلیسی ۲۴talk شرکت کنی که با یه برنامه منسجم و خلاقانه کمک میکنه در زمان کوتاه بتونی به راحتی و روانی انگلیسی صحبت کنی.