一些冷门的科学小知识？英文双语对照

科学冷门知识

　　1、兔子用腿拍打地面的动作来传递信息,用后腿拍打地面的大多数是雄兔,这是它向雌兔表达情感的一种方式.

　　2、世界上最大的猴是狒狒,最小的猴子是倭狨.

　　3、"四不象"真正的名字叫麋鹿,是我国的珍奇动物.

　　4、冰糕为什么会冒气?

　　冰糕冒气是因为外界空气中有不少眼睛看不见的水汽，碰到很冷的冰糕时，一遇冷就液化成雾滴包围在冰糕周围，看上去似乎是冰糕在“冒气”一样。

　　5、向日葵为什么总是向着太阳?

　　向日葵的茎部含有一种奇妙的植物生长素。这种生长素非常怕光。一遇光线照射，它就会到背光的一面去，同时它还刺激背光一面的细胞迅速繁殖，所以，背光的一面就比向光的一面生长的快，使向日葵产生了向光性弯曲。

　　6、蝉为什么会蜕皮?

　　蝉的外壳(外骨骼)是坚硬的，不能随着蝉的生长而扩大，当蝉生长到一定阶段时，蝉的外骨骼限制了蝉的生长，蝉将原有的外骨骼脱去，就是蝉蜕。

　　7、蜜蜂怎样酿蜜?

　　蜂先把采来的花朵甜汁吐到一个空的蜂房中，到了晚上，再把甜汁吸到自己的蜜胃里进行调制，然后再吐出来，再吞进去，如此轮番吞吞吐吐，要进行100～240次，最后才酿成香甜的蜂蜜。

　　8、为什么星星会一闪一闪的?

　　我们看到星闪闪，这不是因为星星本身的光度出现变化，而是与大气的遮挡有关。大气隔在我们与星星之间，当星光通过大气层时，会受到大气的密度和厚薄影响。大气不是绝对的透明，它的透明度会根据密度的不同而产生变化。所以我们在地面透过它来看星星，就会看到星星好像在闪动的样子了。

　　9、为什么人会打呵欠?

　　当我们感到疲累时，体内已产生了许多的二氧化碳。当二氧化碳过多时，必须再增加氧气来平衡体内所需。因为这些残留的二氧化碳，会影响我们身体的机能活动，这时身体便会发出保护性的反应，于是就打起呵欠来。打呵欠是一种深呼吸动作，它会让我们比平常更多地吸进氧气和排出二气化碳，还做到消除疲劳的作用呢。

　　10、为什么蛇没有脚都能走路?

　　蛇的身上有很多鳞片，这是它们身上最外面的一层盔甲。鳞片不但用来保护身体，还可以是它们的「脚」。蛇向前爬行时，身体会呈S形。而每一片在S形外边的鳞片，都会翘起来，帮助蛇前进时抓住不平的路面。这些鳞片跟蛇的肌肉互相配合，并能推动身体向前爬行，所以蛇没有脚也可以走动呀!

　　11、为什么人老了头发便会变白?

我们的头发中有一种叫「黑色素」的物质，黑色素愈多头发的颜色便愈黑。而黑色素少的话，头发便会发黄或变白。人类到了老年时，身体的各种机能会逐渐衰退，色素的形成亦会愈来愈少，所以头发也会渐渐变白啊!

　　12、为什么萤火虫会发光?

　　萤火虫会发光因为在它们的腹部末端有发光器，发光器内充满许多含磷的发光质及发光酵素，使萤火虫能发出一闪一闪的光。萤火虫发光的目的，除了要照明之外，还有求偶、警戒、诱捕等用途。这也是它们的一种沟通的工具，不同种类萤火虫的发光方式、发光频率及颜色也会不同，它们藉此来传达不同的讯息。

　　13、为什么肚子饿了会咕咕叫?

　　肚子饿了便会咕噜咕噜地叫，这是因为之前吃进的食物快消化完，胃里虽然空空的，但胃中的胃液仍会继续分泌。这时候胃的收缩便会逐渐扩大，内里的液体和气体便会翻搅起来，造成咕噜咕噜的声音。下次不要再为肚子咕咕叫而感到尴尬啊!因为这是正常的生理动作呢。

　　14、为什么驼鸟不会飞?

　　身型庞大的驼鸟类的一种，但它们却不会飞上天啊!这不是因为它们的翅膀不管用，而是它们的羽毛都太柔软，翅膀又太小，根本不适合飞行。另外，驼鸟的肌肉不发达，胸骨又平平的，对飞行都没有帮助。驼鸟生活在非洲，由于长期居于沙漠地区，身体为了适应环境，便逐渐演化成现在的样子。

　　15、为什么罐头里食品不容易变坏?

　　午餐肉、豆豉鲮鱼、茄汁豆......都是美味的罐头食物，它们都可以存放很久而不易变坏。这因为罐头是密封的，细菌便无法进入。人们在制造罐头食品的时候，把罐头里的空气全部抽出，然后把它封口。在没有空气的情况下，即使里面的食物沾上少许细菌，它们也无法生存或繁殖啊!

Knowledge of scientific an unexpected winner

1, bunny flaps with the leg the movement of the ground will pass information, flap with the hind leg the great majority of the ground is male hare, this is it conveys affective to doe a kind of means.

2, the biggest clever boy on the world is baboon, the smallest monkey is Rong of an old name for Japan.

3, the name with real " of " David's deer calls elk, it is the rare animal of our country.

4, why can ice-cream risk energy of life?

Because there is lunt in outside air,ice-cream risks energy of life is, when coming up against very cold ice-cream, encounter cold surround into droplet with respect to liquefaction it is all round ice-cream, looking is ice-cream is in it seems that " risk energy of life " same.

5, why does helianthus always side with the sun?

The cauline ministry of helianthus contains a kind of wonderful plant to grow element. This kind grows element special be afraid of light. Encounter radial illuminate, it can go to the one side that be in a poor light, at the same time it returns stimulation to be in a poor light the cell of one side breeds quickly, so, what grow what compare Xiang Guang at the same time what be in a poor light at the same time is fast, make helianthus produced phototropism to bend.

6, why is cicada met exuvial?

The crust of cicada (outside skeletal) it is hard, cannot expand as the growth of cicada, when cicada grows to certain level, of cicada outside the growth that skeleton restricted cicada, cicada shucks off the skeleton outside former some, it is cicada slough.

7, how does the bee brew honey?

Bee first collect the flower that come sweet in the apiary that juice spits a sky, arrived in the evening, again sweet modulation undertakes in the sweet stomach that juice sucks him, spit again next come, swallow again, such take turns hesitates in speech, want to undertake 100 ～ 240 times, final ability leads to sweet honey.

8, why is star flickering?

We see the star sparkles, because the luminosity of star itself appears,this is not change, concern with atmospheric keep out however. Atmosphere is lain between between we and star, when starlight passes aerosphere, can be affected by atmospheric density and thickness. Atmosphere is not absolutely transparent, its diaphaneity is met according to density differ and produce change. So we see tiny spot in the ground through it, can see star is like the appearance that blinking.

9, why can the person yawn?

When we feel tired, a lot of carbon dioxide already produced inside body. When carbon dioxide is overmuch, must increase oxygen to balance the place inside body to need again. Because of the carbon dioxide of these remain, can affect the functional activity of our body, at this moment the response that the body can issue protection, hit a yawn then. Yawning is movement of a kind of deep breathing, it can let us than ever more engulf oxygen and eduction 2 aerification carbon, still achieve the effect that removes exhaustion.

10, why can the snake walk without the foot?

There are a lot of scales on anguine body, this is they go up personally most an armature outside. Scale not only use protective body, still can be them " foot " . When the snake crawls ahead, the body can submit S form. And each scale outside S form, metropolis cock comes, the help captures cobbly road surface when the snake is ongoing. These scale follow anguine muscle to cooperate each other, can drive the body to crawl ahead, so the snake also can ambulate without the foot!

11, why did the person become old can the hair bleach?

There is a kind to cry in our hair " melanin " material, melanin heals the color of much hair heals black. And if melanin is little, the hair can send Huang Huo to bleach. The mankind arrived when old age, all sorts of function of the body can ebb gradually, the formation of pigment also is met less and less, so the hair also can bleach gradually!

12, why can firebug give off light?

Because there is glow in their abdominal extreme,firebug can give off light implement, glow implement inside be full of a lot of phosphorous to give off light to reach glow ferment character, make firebug can give out flickering light. The purpose that firebug gives off light, besides want illume besides, still have the use such as courtship, cautionary, ensnare. This also is a kind of their communication tool, frequency of the glow means of different and phyletic firebug, glow and color also can differ, their thereby will transmit different message.

13, why did abdomen become hungry does meeting cluck cluck cry?

Abdomen became hungry can murmur murmur ground cries, because the food that eat eats before be,this is fast digest, in the stomach although sky is empty, but the gastric juice in the stomach still can continue to secrete. At that time gastric systole can expand gradually, the liquid in is mixed inside gas can turn over agitate, create the voice that murmur murmurs. Do not cluck to cluck cries and feel awkward for abdomen again next time! Because this is normal physiology motion.

14, why won't ostrich fly?

A body giant camel is avian kind, but they won't fly on a day however! Because their wing is used without giving thought to,this is not, however their feather is too soft, wing too small, suit to fly far from. Additional, the muscle of ostrich is underdeveloped, sternal flatly, do not have a help to flying. Ostrich lives in Africa, because be on desert area for a long time, the body for acclimatization, gradually evolution becomes present model.

15, why is the food in can not easy addle?

Beans of juice of dace of Chi of luncheon meat, beans, eggplant. . . . . . It is delicate potted food, they can deposit very long and not easy addle. Because this is potted it is sealed, the bacterium cannot be entered. When people is making potted provision, take out the air in can entirely, next its heal. Falling without airy circumstance, although the food inside touchs a few bacterium, they also cannot live or breed!