addvises.com

Nature

August 26, 2016 23:11

Why does it rain ?

clouds, which we can observe in the sky, made up of water.At the moment when the droplets therein are large and heavy, they fall to the ground.This process we call rain. As you remember, in biology class at school, we were an unusual phenomenon, as the water cycle in nature.Any liquid on the surface of our planet, whether it is a pool, river, sea, lake or ocean, tends to evaporate.When th...

August 26, 2016 23:11

Why do stars fall ?

What is a star?This celestial bodies, which are, were, or will go thermonuclear reactions.In fact, they are huge glowing balls of gas, which are formed from helium and hydrogen as a result of gravitational contraction.It should also be noted that the temperature of the substance in the depths of these balls can be millions of degrees Kelvin, and on the surface - a few thousand degrees Kelv...

August 25, 2016 23:11

Why is snow white ?

question that you can see the title of the topic, often ask the children (the last really love to ask about a variety of things).That's just the parents do not always know the answer, but at school they probably together with the teacher addressed the issue.However, our site will help you find the answer to it. First we need to find out, what is snow and what it actually is?So, in fact ...

August 25, 2016 23:10

Why is sea water salty ?

The school asked a lot of interesting questions.Some of them at first glance seem to be very simple and easy to answer them, but in reality everything is not so simple.Tell me, do you know why the sea water salty?It is in this doubt, because even the scientists do not know the exact answer! versions and hypotheses We begin, perhaps, that's why - when the waters in the world have becom...

August 25, 2016 23:10

Why do leaves turn yellow ?

What is the list?From a botanical point of view is the outdoor plant body, whose main function is photosynthesis.That is why it has a lamellar structure in order to provide that the cells that contain the pigment chlorophyll in chloroplasts have access to sunlight.However, there are leaves, and other functions.So, they are the evaporation of body, breath and Guttation plants (the latter me...

August 24, 2016 23:11

Why does it snow?

Snow - is a form of precipitation that consists of many small ice crystals.It is the heavy precipitation that falls to the ground.By the way, this form of rainfall is considered one of the essential attributes of winter.Of course, there are times when the air temperature is low, but there is no snow at all, but in most cases, under similar circumstances, he certainly falls and lies through...

August 24, 2016 23:11

Why yellow Thuja ?

Tui (sometimes read as thujane) - a plant genus of the family of conifers Cypress.It represents a evergreen shrub, rarely tree.Maximum height - 60 meters, trunk diameter - up to 6 meters.However, in most cases, there are ornamental shrubs, whose growth is several times lower.The young leaves of the plant, needle and soft, while the large scaly. most common garden shaped arborvitae, whic...

August 24, 2016 23:11

Why do leaves turn yellow from the orchid ?

Orchids - the largest family of monocots.It is also one of the oldest in the world, there was presumably Late Cretaceous.These flowers primarily known as a very beautiful ornamental plants, which are more likely to be seen in the greenhouses.The most popular types: Phalaenopsis, Dendrobium and Cattleya. Currently, orchids are common on all continents except Antarctica.Most species grow ...

August 24, 2016 19:44

When the end leaf birch ?

Birch - is a genus of deciduous shrubs and trees Birch family, which is spread almost all over the Northern Hemisphere.It includes about a hundred species.Almost all of the plants anyway used on the farm: birch bark, bark, wood, and even juice. We birch is better known as a tree up to 45 meters in height and girth of up to six meters.However, in our country it is quite common and bushes...