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تاريخ التسجيل : 27/11/2010

مُساهمةموضوع: بحث عن الظوهر الطبيعية (انجليزي الصف العاشر)   الخميس أبريل 14, 2011 8:53 am


Natural phenomena

In our many natural phenomena that occur on our planet we see and hear about them brings good as rain, which brings destruction and desolation sometimes as hurricanes, volcanoes and earthquakes and how they spoke of these phenomena is what we want his statement in a simple and shown to Kyi add to Mosustna own cultural

Extension

Volcanoes

Rain

Eclipses

Fog

Earthquakes

First: the tide

As a result of world-wide and magnify and limbs growing areas are in the darkness of night and the state and regions are offset in the case of the day and in one day and the ball is a traumatic water by about 71% of the total area of plateaus and the largest water are:

* Oceans

* Sea

* Lakes

The definition of the sea surface is:

The level at which up to the sea or ocean water at its beaches and stabilized at this level

But this change increase the level and tell me which is in constant motion and that what is known as tidal

What the tide:

High water level to the maximum number overwhelm him with water on the beach and called the upper limit of the water varies from one region to another may end up in some areas to 10 km and

The Islands:

He re-water to reduce natural to him, goes back down and how much increased

And tides observed with the naked eye

The causes of the tides:

* Session of the earth around itself in 24 hours and 51 minutes and complete this land its so we see areas where there is a tide every 12 hours and 25.5 minutes

* Gravity of the moon and the earth, where they exchange attraction between them during Doranhma about each other

Second: Volcanoes

Cracks ground rush of material melted and Algazan called (magma or lava or Alava), including medium-sized enterprises are called (bombs, volcanic) and some small-scale so-called (ash) and rush liquid substances which lava molten out of the ground through a channel called (smoked volcano) and if I come to the earth flowed to the plains of the crater and neighboring valleys, where cool and turn to the basaltic rocks and the continued flow leads to a cone around the volcano.

The reason for the existence of these materials melt and liquid is the result:

Very high heat and pressure in the depths of the earth melts off these rocks, and cracks through the floor to the surface the problem of volcanoes in the form of high mountains may reach thousands of meters and the types of volcanoes:

* Of active volcanoes: which is still working and throw the lava from time to time and a total of about 476 volcanoes

* Dormant volcanoes: volcanoes are currently suspended for a period and can be renewed activity at any time

* Finished volcanoes: volcanoes which excludes re-recurrence

And volcanoes affect the environment negatively in terms of Algazan starting the fires that caused and the damage to trees and forests, farms and houses

And sometimes benefit from agricultural soils where fertility.

The information found on the Earth's surface 455 volcanoes in revolt, and 80 volcanoes deep under the sea

Third: the rain

Rain: rain resulting from:
A - Tboukrmiah seas and rivers because of the heat as plants to emit a quantity of water vapor.
B - steam rising into the upper atmosphere of lightness and then cools and condenses to form clouds.
C - carried by the wind and the clouds to take the land and to lift them when the top layers of the atmosphere over the temperature drops and fall rains.
Rain
More forms of the spread of condensation, and different types depending on the manner in which the air rises to the upper atmosphere and condenses.
- When the air rises due to rainfall arising terrain topography (rain coastal mountains of the Levant and the slopes of the GNU pulp to the Himalayas)
- And the height of the water vapor laden air currents upward, causing the upward rain (rain tropical zone)
- The warm moist air rises above cool air dry causing rain storms (rain temperate zone)
Distributed rains

More areas of rain (tropical zone, South-east Asia, and the coastal mountains)
Less rain areas (mid-continents of Asia, Australia, helping American Samalia)

1 - areas of rain Standing: The tropical zone and west of the continent of Europe.
2 - Winter rainfall areas: the Mediterranean region.
3 - summer rain areas: the tropical and Elmo toxicity.

IV solar and lunar eclipses

Eclipse special phenomenon of the sun and his absence during the day in full or partial eclipse then we say, wholly or partially

The eclipse afflicts the moon at night, where our eyes kept for specific periods may be any total or partial eclipse, where the entire miss part of the consideration

Beginning of the offer specific information about the situation:

The earth revolves around the same two sessions of the first: On the same day / 24 / hour / 51 / min and Hmamaiaraf day and night to day and the second cycle around the sun takes / 365 / day and / 265% / day and this is known as the Year and as the speed of this rotation large

And the land they live on a planet and its moon is known about this land of the dates and times of stable and accurate

And the earth and the moon Matman icy bodies that were taking the light from the sun

These phenomena occur when the moon and the earth and the sun on one line, for ease of interpretation of the statement and

Can say that

Watching the eclipse occurs when Earth's shadow on the area illuminated, the moon is known as the body of a dark does not shine of itself, but reflects the sunlight falling upon to become visible to the inhabitants of the earth, and vary the area illuminated by position of the moon from the earth, when it between us and the sun is half dark ahead Bright and half from the opposite side of the sun, so I do not see something from him and called the situation Palmhak, and then the eclipse will be in the shade. When the moon is moving to the east face bright start ruins us, and we call the crescent to be up to the other side we see all of the bright half. For more you can review


Measured by the lunar month how long does it take in a full cycle around the Earth are not constant, ranging between (29 days and 19 hours) and (29 days 5 hours) and thus the rate of the lunar month of 29 days and 12 hours and 24 minutes 3 seconds

Cause of lunar eclipses:

1. If there is the moon in Earth's shadow on the beholder and Onhjb event where the total eclipse of the moon between the earth and the sun in total eclipse lasts more than 1 / / min / 40% / minute of

2. And when the part of the moon in the Earth's shadow and the other part has happened in the shade and partial eclipse partial eclipse Edom Aktrmen / / 3 hours

The cause of the eclipse:

If mediate the moon between the earth and the sun and the moon's shadow fell on the ground the sun disappear for some areas of the globe, speaking on the phenomenon of the eclipse is of two types

1. Total Solar Eclipse: If the moon's shadow on the part of the land become obscured vision of the sun from the people (the moon is between Earth and the Sun) in this part, and said that Eclipse completely and last total eclipse Aktrmen / 7.5 / min and where the sun is in the form of ring glowed a beautiful scene

2. Partial eclipse: And when the semi-light of the moon (shaded) on the area of land Ohjpt vision part of the sun for the people in this region and is said to eclipse part may last 2 hours does not show the command in every 1.5 years, either in the same area may not occur Lal Sell years long

For information, say that:

Longest eclipse of the sun, may last for 7 minutes and 29 seconds in Alotalentik 2186. On 20 June 1955, eclipsed the sun for 7 minutes and 8 seconds. The lunar eclipse, it runs to 104 minutes maximum. And the largest number of solar and lunar eclipses did not exceed 7 times a year

Fifth: The Fog

It is a natural phenomenon for:

Drops of water high in the air: and occurs as a result of condensation of water vapor near the surface of the earth and help on the configuration of dust and smoke and various impurities in the air, suspended by the steam.

Varies depending on the degree of vapor density, where the higher density of steam fog was most dense

The types of fog:

* Fog land occurs over land as a result of the loss of the Earth's surface temperature and the presence of moisture in the air

* Fog valleys: occurs in the valleys as a result of the cold wind from the top of the mountains to the valleys

* Fog of the sea: It is formed as a result of sea currents blowing warm to cool regions and possible to move the fog to land large distances and Fog is a real threat to public safety as more and more as a result of traffic accidents occur during low visibility, especially thick of it

VI: Earthquakes

Definition, types, characteristics
The definition of Earthquakes:
The Earth is composed of layers of several key positioned on top of each other, and each layer properties and the status of physical private, according to its depth from the surface of the earth and some of the factors surrounding it (pressure, temperature) control Bodeitha in terms of hardness and Maipetha and earthquake affects the cortex in which we live them directly.
Lithosphere depth = 70 km, of which the thickness of the outer shell on land = 35 km and 25 km in the ocean.
This atmosphere is composed of several layers of sheet rock and is formed of metal and solid rock and these plates float on a layer cover Alsharri component of rocks, minerals, semi-melted due to heat and high pressures.
The plates consisting of the outer casing is characterized by a fixed survival because of the similarities tawaaf top of the layer dissolved, and moving relative movement between them is estimated about 20-10 cm per year. And eventually collide or diverge or move lateral movements between the effects on the earth's crust because of the relative motion for sheet rock layer, Cruciform external phenomena of the terrain (mountains and valleys and canyons and faults)
Known as the earthquake:
Move outer crust of the Earth resulting from the sudden and rapid movements occur in the layers of the earth.
Types of earthquakes:
Underground earthquake: epicenter, where the depth of 700 km below the surface.
Tectonic earthquakes: happens every year, more than half a million of them Ncarabh 100 000 and more than 10000 cause damage.
Structural earthquake: impact on the crust to form and trauma that change the shape of the Earth (landmarks)
Earthquakes Taoism to the surface: turn the Earth's crust and the Aishqha
Marine earthquakes: and the cause of rising sea floor Ooankhvad
Alanhiarip earthquakes: a weak earthquakes and a small effect is simple.
Characteristics of earthquakes:
And earthquake-four properties: the expected size of the earthquake (Force), the coordinates of the epicenter underground, the coordinates of the quake's epicenter, blasted time.
One of the main characteristics of the earthquake FFA Chtera U.S. scientist (Charles Francis Richter) Richter device to record and measure the changes of vertical and horizontal vibrations .... And recording the time of the quake and its time (it took) and there are other devices

Located in one year 500 000 Aktrmen earthquake


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