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Practice Listening: Multiple Choice, Single Answer ID: #41047 Short A snowflake
Instructions ›
You will see a video about how snow is formed. Listen to the recording and answer the multiple-choice question by selecting the correct response. Only one response is correct.

Transcript:

A snowflake consists of masses of tiny bits of ice, microscopic specks of soil blown up from the ground usually begin the process of creating the snowflakes that fall as snow. The specks act as ice nuclei in clouds that have temperatures below freezing, tiny bits of ice, called snow crystals, are the basic components of snowflakes. Snow crystals may be formed when water vapor is deposited directly on ice nuclei, or when the ice nuclei cause tiny drops of supercooled water to freeze. Supercooled water is water that has remained unfrozen at temperatures below freezing. Every snow crystal has six sides, but each one differs in shape. Snow falls to Earth in the form of snowflakes. Each snowflake is made up of snow crystals in the clouds, snow crystals collide and stick together to form the snowflakes.

What role do microscopic specks of soil play in the formation of snowflakes?

* Listen to the recording and select the correct answer

Result:

AI explanationShows the answer. Tap to open.
Option 2: "They serve as ice nuclei to begin snowflake formation."

Explanation: This option is correct as the text explicitly states that microscopic specks of soil are the initial components that act as ice nuclei in clouds, which is essential for the formation of snowflakes. This aligns directly with the main idea of the text regarding the formation process.

Option 1: "They increase the temperature of clouds."

Explanation: This option is incorrect because the text does not mention anything about microscopic specks of soil increasing the temperature of clouds. Instead, it states that these specks act as ice nuclei, which is a different function altogether.

Option 3: "They change the shape of snow crystals."

Explanation: This option is incorrect because the text does not indicate that microscopic specks of soil have any role in changing the shape of snow crystals. Instead, it focuses on their role as ice nuclei, which is unrelated to altering shapes.

Option 4: "They prevent snow crystals from sticking together."

Explanation: This option is incorrect as the text does not support the idea that microscopic specks of soil prevent snow crystals from sticking together. In fact, the text describes how snow crystals collide and stick together to form snowflakes, indicating that the specks facilitate rather than hinder this process.

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