Complete the texts by selecting the most appropriate words. They say that no two snowflakes are the same. That may be true, but snowflakes share some striking similarities-they are all (1) in a similar kind of way. They all have 'six-fold radial symmetry. A snowflake is born when water vapour travels through the air and condenses in a particle. There it forms a slowly growing crystal. There are two basic ways that the vapour can condense. Each way plays a big role in the shape that the snowflake will eventually (2) . The first way is to form what are called 'facets,' a flat face in a 30 shape, like a prism. They form (3) when a crystal grows. In ice crystals, the shape they take mirrors the shape of the molecules forming the crystal. The crystal structure of frozen ice is a six-sided shape. Therefore an icy facet is six-sided as well. That is where the symmetry in a snowflake comes from. The second way to grow a snowflake is to form (4) Not surprisingly, this is what creates those beautiful tree-like structures. Branches form because water vapour will condense on the first thing it touches. If there is a small bump on a flake's surface, the vapour will condense there instead of traveling any further. Now the bump is bigger and even more likely to 'catch' water vapour at that point. The process repeats itself and a branch (5) ! (Source: https://scijinks.gov/snowflakes/)

Question

Complete the texts by selecting the most appropriate words.

They say that no two snowflakes are the same. That may be true, but snowflakes share some striking similarities-they are all (1) ____ in a similar kind of way. They all have 'six-fold radial symmetry.

A snowflake is born when water vapour travels through the air and condenses in a particle. There it forms a slowly growing crystal. There are two basic ways that the vapour can condense. Each way plays a big role in the shape that the snowflake will eventually (2) ____.

The first way is to form what are called 'facets,' a flat face in a 30 shape, like a prism. They form (3) ____ when a crystal grows. In ice crystals, the shape they take mirrors the shape of the molecules forming the crystal. The crystal structure of frozen ice is a six-sided shape. Therefore an icy facet is six-sided as well. That is where the symmetry in a snowflake comes from.

The second way to grow a snowflake is to form (4) ____ Not surprisingly, this is what creates those beautiful tree-like structures. Branches form because water vapour will condense on the first thing it touches. If there is a small bump on a flake's surface, the vapour will condense there instead of traveling any further. Now the bump is bigger and even more likely to 'catch' water vapour at that point. The process repeats itself and a branch (5) ____!

(Source: https://scijinks.gov/snowflakes/)

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