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Practice Listening: Select Missing Word ID: #4175 Short Classes
Instructions ›
You will hear a recording. At the end of the recording the last word or group of words has been replaced by a beep. Select the correct option to complete the recording.

Transcript:

So initially they were interested in at the fact that different classes seem to move at different speeds and one of the first things I noticed was it if you in a big valley, the bits of ice at the side of the valley don't move as fast as the bits of ice in the middle and so they were collecting this together and then they were trying to piece together, why the ice was moving? What what was the sort of micro mechanics of bits of ice that allows it to move. Well normally we think that ice is quite a solid substance and Ice cube you don't imagine it flowing. Which is what the glacier does. And that's because of the different pressures. So an ice is made of little crystals and the crystals have defects. And when they're put under a big pressure then the defects can move, and then it looks like the ice is flowing - just like the flow of the fluid.
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Result:

AI explanationShows the answer. Tap to open.
Option 4: "just like the flow of the fluid"

Explanation: This option is correct as it directly relates to the text's conclusion about the behavior of ice under pressure. The author compares the movement of ice to fluid flow, highlighting the mechanics of ice movement in glaciers.

Option 1: "validating the mechanics of dry ice"

Explanation: This option is incorrect because the text discusses the mechanics of ice in glaciers, not dry ice. The context focuses on how ice flows under pressure, which is not related to validating mechanics of dry ice.

Option 2: "irrespective of pressure"

Explanation: This option is incorrect as it contradicts the text. The passage emphasizes that pressure affects the movement of ice, stating that defects in ice crystals can move under pressure, leading to flow.

Option 3: "because pieces always wanted to come together"

Explanation: This option is incorrect because it does not accurately reflect the text's explanation of ice movement. The text does not mention pieces wanting to come together; instead, it discusses how pressure affects the flow of ice.

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