Advice 1: Why leaves are green

The flora is varied and beautiful. When we think or talk about nature, to mind immediately comes an abundance of rich green grass and bursting with oxygen the trees have green foliage. And why are leaves green?
Why leaves are green
Green leaf is a small factory of oxygen, so necessary to the respiration of human and animals that inhabit the Earth. Green leaves and grass, in which the familiar and evokes pleasant thoughts about the freshness and health. And so it is, after all, green leaves are alive. And, as in all living organisms, they occur in chemical processes important for life. These processes are necessary for plant growth, its nutrition and respiration.
What chemical process happens in the leaf, contributing to its coloring in green? This process is called photosynthesis and takes place in two stages. The first stage is the absorption of light, the second stage is the use of light in chemical reactions (the interaction of carbon dioxide and water).
Absorption of light occurs by means of an adhesive substance, a pigment called "chlorophyll". Light has wide color range, however, the chlorophyll absorbs not any light quanta, but only with a specific wavelength of light, because it affects the rate of photosynthesis.
Most quickly this process takes place in blue-violet and red parts of the spectrum, so these colors absorb chlorophyll. The green color of the spectrum gives the process a very minimal speed, and therefore is not absorbed and is reflected from the sheet.
The human eye can distinguish colors only in sufficient light, so he sees the reflected green spectrum, which is an indication that the plant is photosynthesis.
In the sheet there are also other pigments, but their action is too weak and overshadowed by the influence of chlorophyll. When the world becomes smaller, for example, in the fall, the chlorophyll disappears, and their role becomes the main, and the leaves acquire a different color - yellow or red.
In the second stage of photosynthesis is the chemical reaction of a compound of carbon dioxide from the atmosphere (exhaled by humans and animals) and water from the root system. This reaction leads to the formation of glucose and other nutrients, and oxygen. Substances useful for plants, and for humans and animals who consume it in food.
The role of oxygen on the planet is huge: it is necessary for breathing and ensure that all vital processes in organisms of people and animals, as well as other chemical processes, such as combustion in which carbon dioxide is also released. Therefore, plants are called the "lungs of the planet".

Advice 2 : Why is the grass green

If you go to the meadow in the morning, when the fresh dew covered grass, you notice the bright fresh stormy ocean of green. Green color is inextricably linked to the understanding of the people with grass. And with good reason.
Why is the grass green
In childhood, many wondered about the reason for the green of the grass. However, not every parent is able to give the correct answer. Even those who were as in biology, do not always possess all information.

The simple answer is that in the cells of the herb contains a special substance is chlorophyll, which is green. If a little shake smart, you can even remember what the process of photosynthesis, experiments with potatoes and iodine and so on.

What scientists say

But really, inquiring minds are unlikely to calm down so that just the green chlorophyll. Inevitably arises the following natural question about how and why everything is what it is. Why green was elected by nature to grass, or the contained chlorophyll.
Chlorophyll is considered one of the good herbal components of many drugs. Scientifically it is not proven.

However, the inquisitive scientific minds have found the answer to this question. As you know, for the process of photosynthesis plants, like the grass in particular, absorb sunlight. And as you know people even slightly familiar with the school course of physics – electromagnetic radiation is displayed on a separate color being passed through a special prism. That is, "Every Hunter Wishes to Know Where Sits Pheasant". Mnemonic device remember red, orange, yellow, green, blue, Indigo, violet colors of the spectrum.

Chlorophyll has a distinctive composition, absorbing almost the entire spectrum. Except... green. The only color plants (in normal, not wilted) and reflect what people see with their own eyes. Turns out just a kind of electromagnetic optical effect, thanks to which people have long thought that grass is green.

Yellow grass

In the autumn under the influence of cold and seasonal memory in plants the chlorophyll is destroyed. As a result, the effect of yellowing or reddening of leaves and grass.

This is because the solar day is shorter, the plant can no longer obtain enough electromagnetic light radiation for normal functioning.

There is a kind of preservation of the plant until the following spring that protects it from the ravages of frosts and other climatic factors.

Interesting facts about colors

Despite the fact that green is the color of the grass, in the world there are many other colors and tones. Not so long ago scientists found out that the favorite color in the world is blue.
Found that blind from birth people are able to see colored dreams. The nature of this is unknown.

Red men and women perceive differently. So, for the stronger sex is quite difficult task is a distinction of crimson, purple and coral. For women it is much easier.

Colors can be associated with music. When sad they are gray and black, with cheerful yellow and orange.
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