百科知識視頻之煎蛋小學(xué)堂78 精美的雪花是如何形成的

The snowflake might be the world's favourite symbol of winter,The surprisingly complex and beautiful shapes are made of ice,Nuature's simplest hydrogen bond crystal,But how are these delicate structures formed?

雪花或許是世界上最招人愛的冬天的象征，由冰晶構(gòu)成的令人驚奇的美麗形狀，大自然最簡單的氫鍵晶體，但這樣精美的結(jié)構(gòu)是如何構(gòu)成的呢?

No two snowflakes form in the exact same way.But here's a possible set of steps.A snowflake starts as dust grain floating in the cloud,Water vapor in the air sticks to the dust grain,And resulting droplet turns into ice,Crystal faces appear on the frozen droplet,Then a prison froms with six faces and a top and a bottom.

沒有兩片雪花的形成過程是完全一樣的，這里說的是一種可能的過程，一片雪花的形成首先從云層中塵埃顆粒開始，空氣中的水蒸氣粘附在塵埃顆粒上，由此產(chǎn)生的液滴變成了冰，結(jié)晶面出現(xiàn)在冰凍的液滴上，之后形成一個六個側(cè)面 一個上面和一個下面的棱體。

A cavity forms in each prison face,Because ice grows fastest near the edges,Faster grows on the corners causes six branch sprout,The lines in each branch are due to ridges and grooves on the surface,The six branches form the corners of the hexagon which forms into the shape.Because the water molecules chemically bond into a hexagonal network.

由于邊緣冰生長速度比較快，所以每面都會出現(xiàn)一個凹槽，邊角的快速生長導(dǎo)致六條支線開始萌芽，每條分支上的線是因為表面的凸脊和凹槽，六條分支形成六邊形的角形成各種形狀，因為水分子通過化學(xué)鍵結(jié)合成六邊形的網(wǎng)狀結(jié)構(gòu)。

When the temperture cools to nine degrees fahrenheit,New growth branch tips norrow.As six degrees side branches begains sprout.Suddenly the crystal encounters quick blast of warmer air followed by cooler air.And even more side branches sprout.The crystal gradually warms making the tips long and narrow.The crystal falls into even warmer air.Which slows the growth and widen the tips.

當(dāng)氣溫降到9華氏度時(-12.8攝氏度)新生的分支尖端開始變窄，6華氏度時(-14.5攝氏度)側(cè)向分支開始出現(xiàn)，這時晶體突然遭受了一陣快速爆發(fā)的暖流接著又是冷氣，更多的側(cè)分支開始形成，晶體漸漸受熱使得尖端又長又細(xì)，晶體降落到暖和的空氣中，就不再生長 尖端卻越來越寬闊。

Finally this unique and delicate strucure falls to the earth.Along with countless other snowflakes,The old saying that no two snowflakes are like.Maybe ture for larger snowflakes,But not for smaller simplier crystals that fall out of the sky at earlier stages,Before the had a chance to fully develop,Still the ever changing environment and many ways that H2O combind in the crystal surface.Means that snowflakes can never mind-boggling array of shapes,But they have one thing in common,They are all easy on the eyes.

最終這種獨特而精美的結(jié)構(gòu)飄落紅塵中，伴隨著不計其數(shù)的雪花同伴，古語云沒有兩片雪花是一樣的，這或許對大片的雪花成立，但對初期處于剛開始形成階段的小晶體來說卻不一定，因為它們都還沒有機會充分生長，由于不斷變化的環(huán)境，和在晶體表面的水分子結(jié)合方式的不同。意味著雪花絕不會形成同樣的形狀組合，但它們有一個共同之處，它們都十分養(yǎng)眼。