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LanguageCert Practice Listening: Part 3 (Monologue) ID: #60340 Hard Yellow 7

Instructions ›

You will hear a student giving a presentation about an ancient building called a ‘yakhchal’ that was used to make ice in desert regions. Complete the information on the notepad. Write short answers of one to three words. You will hear the presentation twice. You have thirty seconds to look at the notepad.

Transcript:

Listening Part 3 You will hear a student of archaeology giving a presentation about an ancient building called a yakchal that was used to make ice in desert regions. Complete the information on the notepad. Write short answers of one to three words. You will hear the presentation twice. You have 30 seconds to look at the notepad. Today I'm going to talk about an ancient structure called a yakchal, which was used for both the manufacture and storage of ice in desert regions in ancient times. Yakchal were commonly found across ancient Persia around 2,000 years ago. Remains of these structures have been found dating as far back as 400 BCE. They were built to last, and many appear to have been in constant use over several centuries. Yakchal were carefully designed and built, with three main components. A dome-shaped structure, the icehouse had a hole at the peak and a sunken interior where the ice was kept. Next to the structure was a long, high wall, known as a shade wall. and beyond this was a pool open to the air in which groundwater would collect. The shade wall allowed the water in the pool to cool to the point where it formed ice. Once this was thick enough, it was cut into blocks and stored inside the ice house where it was protected against the heat of the day. The material used to build both the ice house and the shade wall was a unique water-resistant mortar called Saruj. This was composed of sand, clay, egg white, lime, goat hair, and ash. The resulting material was resistant to heat transfer and completely impenetrable to water. Making ice in the desert sounds pretty much impossible. but the thickness of the ice house wall and separate shade wall offered a high degree of insulation. This meant that the Yakchal could reach incredibly low temperatures despite the desert heat. This by itself wasn't enough however. It was the arid desert climate that allowed the Yakchal to work. As the surrounding air was almost completely lacking in humidity, radiative cooling from the domed icehouse occurred, cooling the interior in a way that wouldn't have been possible if there had been any moisture in the environment. The evaporation of some of the water from the interior of the icehouse through the hole in the dome kept the interior cool. This, coupled with high winds, which removed the evaporated water efficiently from the surrounding area, meant that the temperature inside could drop below freezing. At the same time, the water in the pool outside froze. Many structures took advantage of the cold nighttime desert temperatures. The radiative cooling would continue in the darkness because the outside air was still very dry. But the mean temperature would drop, and this boost to refrigeration would allow the ice to persist inside the icehouse during the day. The ice itself also formed part of the cooling mechanism, providing water for the cooling process and acting on a similar principle to that found in a radiator designed to keep a modern house warm, except that here the principle was working the other way round to keep things cool. The low temperature inside the structure meant that goods could be stored there as well as ice, rather like in a modern-day refrigerator. A particular favourite of people at the time was sorbet, a dessert made from water, and this could be successfully stored in the structure. Interestingly, yakchal don't actually need to be as complex as they were in order to be effective. A simple shade over a sufficient amount of water will produce a cooling effect as the water evaporates into the dry surrounding air. But the yakchal reached an astonishing degree of sophistication and represented a significant driver in the expansion and success of the ancient Persian Empire. Many yakchal have deteriorated over the years due to widespread use of modern refrigeration methods, but some still survive. And interest in them has been revived because they offer interesting technological insights useful for anyone working on sustainable architecture. There may also be potential for low-energy housing this is something that needs further investigation. Today I'm going to talk about an ancient structure called a yakchal, which was used for both the manufacture and storage of ice in desert regions in ancient times. Yakchal were commonly found across ancient Persia around 2,000 years ago. Remains of these structures have been found dating as far back as 400 BCE. They were built to last, and many appear to have been in constant use over several centuries. Yakchal were carefully designed and built, with three main components: a dome-shaped structure (the icehouse had a hole at the peak and a sunken interior where the ice was kept). Next to the structure was a long, high wall, known as a shade wall. and beyond this was a pool open to the air in which groundwater would collect. The shade wall allowed the water in the pool to cool to the point where it formed ice. Once this was thick enough, it was cut into blocks and stored inside the ice house where it was protected against the heat of the day. The material used to build both the ice house and the shade wall was a unique water-resistant mortar called Saruj. This was composed of sand, clay, egg white, lime, goat hair and ash. The resulting material was resistant to heat transfer and completely impenetrable to water. Making ice in the desert sounds pretty much impossible. but the thickness of the ice house wall and separate shade wall offered a high degree of insulation. This meant that the Yakchal could reach incredibly low temperatures despite the desert heat. This by itself wasn't enough, however. It was the arid desert climate that allowed the Yakchal to work. As the surrounding air was almost completely lacking in humidity, radiative cooling from the domed icehouse occurred, cooling the interior in a way that wouldn't have been possible if there had been any moisture in the environment. The evaporation of some of the water from the interior of the icehouse, through the hole in the dome, kept the interior cool. This, coupled with high winds, which removed the evaporated water efficiently from the surrounding area, meant that the temperature inside could drop below freezing. At the same time, the water in the pool outside froze. Many structures took advantage of the cold nighttime desert temperatures. The radiative cooling would continue in the darkness because the outside air was still very dry. But the mean temperature would drop, and this boost to refrigeration would allow the ice to persist inside the icehouse during the day. The ice itself also formed part of the cooling mechanism, providing water for the cooling process and acting on a similar principle to that found in a radiator designed to keep a modern house warm, except that here the principle was working the other way round, to keep things cool. The low temperature inside the structure meant that goods could be stored there as well as ice, rather like in a modern day refrigerator. A particular favourite of people at the time was sorbet, a dessert made from water, and this could be successfully stored in the structure. Interestingly, yakchal don't actually need to be as complex as they were in order to be effective. A simple shade over a sufficient amount of water will produce a cooling effect as the water evaporates into the dry surrounding air. But the Yakchal reached an astonishing degree of sophistication and represented a significant driver in the expansion and success of the ancient Persian Empire. Many Yakchal have deteriorated over the years due to widespread use of modern refrigeration methods, but some still survive and interest in them has been revived because they offer interesting technological insights useful for anyone working on sustainable architecture. There may also be potential for low energy housing. This is something that needs further investigation.

Yakhchāl: a means of making ice in Ancient Persia

Yakhchal were robust structures, and were used as far back as 400 BCE.

The design includes a dome with a hole at its (1), a wall and a pool.

Yakhchāl were constructed using a heat-resistant material known as ‘sarooj’.

The walls provided good levels of (2), allowing the structure to become very cold.

Very low (3) levels in the surrounding air meant the ice house remained cool.

Evaporation, aided by (4), led to freezing temperatures inside the ice house.

Cooling continued in the hours of (5), helped by the temperature and dryness.

The ice pools inside the dome behaved in a similar way to a (6) in a modern building.

Food was also commonly stored in yakhchal.

Despite the simplicity of the principles involved, yakhchāl were very sophisticated structures.

Yakhchāl are a source of inspiration and ideas for people currently designing (7).

Result:

Explanation

{ "questions": [ { "question": 1, "correct_answer": "peak", "why_correct": "The speaker says the icehouse 'had a hole at the peak'. The notepad says 'a dome with a hole at its ___', so the answer is peak.", "alternative_answers": [], "common_mistakes": "Students may write 'top' as a synonym, but the exact word spoken is peak. This is a Spelling and Word Form mistake if you swap it.", "key_listening_points": [ "Listen for where the hole is in the dome", "The notepad word 'dome' matches the audio phrase 'dome-shaped structure'" ], "tips": "Write the exact word you hear ('peak'), even if another word like 'top' means the same.", "transcript_reference": "...Yakhchal were carefully designed and built, with three main components. A dome-shaped structure, the icehouse had a hole at the peak and a sunken interior where the ice was kept. Next to the structure was a long, high wall, known as a shade wall...." }, { "question": 2, "correct_answer": "insulation", "why_correct": "The speaker says the thick walls 'offered a high degree of insulation', letting the structure get very cold. The notepad says walls gave good levels of '___', so the answer is insulation.", "alternative_answers": [], "common_mistakes": "Students may write 'thickness', but that is the reason for the insulation, not the answer word. This is a Paraphrase Confusion mistake.", "key_listening_points": [ "Listen for what the thick walls provided", "The notepad phrase 'allowing the structure to become very cold' matches 'could reach incredibly low temperatures'" ], "tips": "Insulation keeps heat out or in, so link it to the walls staying cold inside.", "transcript_reference": "...Making ice in the desert sounds pretty much impossible, but the thickness of the ice house wall and separate shade wall offered a high degree of insulation. This meant that the yakhchal could reach incredibly low temperatures despite the desert heat." }, { "question": 3, "correct_answer": "humidity", "why_correct": "The speaker says 'the surrounding air was almost completely lacking in humidity', which allowed cooling. The notepad says 'Very low ___ levels', so the answer is humidity.", "alternative_answers": [], "common_mistakes": "Students may write 'moisture', which is close, but the word used is humidity. This is a Spelling and Word Form mistake if you swap it.", "key_listening_points": [ "Listen for the word that means water in the air", "The notepad phrase 'low levels in the surrounding air' matches 'lacking in humidity'" ], "tips": "Humidity means dampness in the air; low humidity means dry air.", "transcript_reference": "...It was the arid desert climate that allowed the yakhchal to work. As the surrounding air was almost completely lacking in humidity, radiative cooling from the domed icehouse occurred, cooling the interior in a way that wouldn't have been possible if there had been any moisture in the environment." }, { "question": 4, "correct_answer": "wind", "why_correct": "The speaker says evaporation, 'coupled with high winds', dropped the temperature below freezing. The notepad says 'Evaporation, aided by ___', so the answer is wind.", "alternative_answers": [ "high winds", "winds" ], "common_mistakes": "Students may write 'evaporation', but that word is already on the notepad. Listen for what helped it. This is a Paraphrase Confusion mistake.", "key_listening_points": [ "Listen for what carried the evaporated water away", "The notepad word 'aided by' matches the audio phrase 'coupled with high winds'" ], "tips": "Do not repeat a word already on the notepad; find the helper word in the audio.", "transcript_reference": "...The evaporation of some of the water from the interior of the icehouse through the hole in the dome kept the interior cool. This, coupled with high winds, which removed the evaporated water efficiently from the surrounding area, meant that the temperature inside could drop below freezing." }, { "question": 5, "correct_answer": "darkness", "why_correct": "The speaker says 'The radiative cooling would continue in the darkness'. The notepad says cooling continued 'in the hours of ___', so the answer is darkness.", "alternative_answers": [], "common_mistakes": "Some students write 'night', which is close, but the exact word used is darkness. This is a Spelling and Word Form mistake if you swap it.", "key_listening_points": [ "Listen for when the cooling kept going", "The notepad phrase 'helped by the temperature and dryness' matches 'because the outside air was still very dry'" ], "tips": "Write the exact word from the audio ('darkness'), even though 'night' means much the same.", "transcript_reference": "...Many structures took advantage of the cold nighttime desert temperatures. The radiative cooling would continue in the darkness because the outside air was still very dry. But the mean temperature would drop, and this boost to refrigeration would allow the ice to persist inside the icehouse during the day...." }, { "question": 6, "correct_answer": "radiator", "why_correct": "The speaker says the ice acted 'on a similar principle to that found in a radiator designed to keep a modern house warm'. The notepad compares it to a '___ in a modern building', so the answer is radiator.", "alternative_answers": [], "common_mistakes": "Students may write 'refrigerator', which appears later, but the comparison here is to a radiator. This is a Near-Miss Distractor mistake.", "key_listening_points": [ "Listen for the modern heating object the ice is compared to", "The notepad phrase 'in a modern building' matches 'to keep a modern house warm'" ], "tips": "A radiator normally warms a house; here the speaker says it works the opposite way to cool.", "transcript_reference": "...The ice itself also formed part of the cooling mechanism, providing water for the cooling process and acting on a similar principle to that found in a radiator designed to keep a modern house warm, except that here the principle was working the other way round to keep things cool." }, { "question": 7, "correct_answer": "sustainable architecture", "why_correct": "The speaker says yakhchal offer insights 'useful for anyone working on sustainable architecture'. The notepad says they inspire people 'currently designing ___', so the answer is sustainable architecture.", "alternative_answers": [], "common_mistakes": "Students may write only 'architecture' and drop 'sustainable', losing the key idea. This is a Partial Answer mistake.", "key_listening_points": [ "Listen near the end for what modern designers can learn from", "The notepad word 'inspiration' matches the audio phrase 'a source of inspiration and ideas'" ], "tips": "The last gap comes at the end, so listen for the two-word phrase about modern design.", "transcript_reference": "...Many yakhchal have deteriorated over the years due to widespread use of modern refrigeration methods, but some still survive, and interest in them has been revived because they offer interesting technological insights useful for anyone working on sustainable architecture. There may also be potential for low-energy housing...." } ] }

A.I. Explanation:

Correct Answer: peak
Why this is correct: The speaker says the icehouse 'had a hole at the peak'. The notepad says 'a dome with a hole at its ___', so the answer is peak.
Tips: Write the exact word you hear ('peak'), even if another word like 'top' means the same.
Correct Answer: insulation
Why this is correct: The speaker says the thick walls 'offered a high degree of insulation', letting the structure get very cold. The notepad says walls gave good levels of '___', so the answer is insulation.
Tips: Insulation keeps heat out or in, so link it to the walls staying cold inside.
Correct Answer: humidity
Why this is correct: The speaker says 'the surrounding air was almost completely lacking in humidity', which allowed cooling. The notepad says 'Very low ___ levels', so the answer is humidity.
Tips: Humidity means dampness in the air; low humidity means dry air.
Correct Answer: wind
Why this is correct: The speaker says evaporation, 'coupled with high winds', dropped the temperature below freezing. The notepad says 'Evaporation, aided by ___', so the answer is wind.
Tips: Do not repeat a word already on the notepad; find the helper word in the audio.
Correct Answer: darkness
Why this is correct: The speaker says 'The radiative cooling would continue in the darkness'. The notepad says cooling continued 'in the hours of ___', so the answer is darkness.
Tips: Write the exact word from the audio ('darkness'), even though 'night' means much the same.
Correct Answer: radiator
Why this is correct: The speaker says the ice acted 'on a similar principle to that found in a radiator designed to keep a modern house warm'. The notepad compares it to a '___ in a modern building', so the answer is radiator.
Tips: A radiator normally warms a house; here the speaker says it works the opposite way to cool.
Correct Answer: sustainable architecture
Why this is correct: The speaker says yakhchal offer insights 'useful for anyone working on sustainable architecture'. The notepad says they inspire people 'currently designing ___', so the answer is sustainable architecture.
Tips: The last gap comes at the end, so listen for the two-word phrase about modern design.

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