Water role in nature
Water water is the most common and important substance on Earth. Common water reserves on the planet are 133,800 cubic kilometers. Of this amount, 96.5% are accounted for by the World Ocean, 17% are groundwater, 1.74% are glaciers and constant snow. However, total fresh water reserves constitute only 2.53% of the total water reserves.
Freshwater stocks on the planet are limited, but they are constantly updated. The velocity rate determines the water resources available to person. In the patriarchal era on Earth, water circulation, which included plums, rains, snowfall, floods, and so on, was, despite nature cataclysms, a beneficial person. The rains, the melting waters were irrigated to the ground, brought the substances beneficial for plants, revived the medium itself.
With the development of civilization, when chemical fertilizers appeared, detergents, internal combustion engines, when the human activity became natural-pieces, when a person separated himself from nature and became above it, human life waste began to pollute everything and primarily the reservoir. In ancient times, when a person lived in harmony with nature, any fresh water is except with the exception of swamp water, was drinking. There was marine water and just water, without any additional definitions. It was believed that water is a mineral that a person should use natural.
Now a person talks about a separate variety of water - drinking water. In addition, there are water of rivers, lakes, where it is possible and can not be bought by a person. There are wastewater, there are acid rains, there are emissions from a reservoir of waste enterprises, from which all living in the water dies. Today, the water circuit in nature is tightly connected with the Technogenic Environment.
In the primary water shell of the globe of the water was much less than now (no more than 10% of the total amount of water in water bodies and rivers at present). An additional amount of water appeared later as a result of the release of water, which is part of the earth's subsoil. According to experts, the water mantle of water is 10-12 times more than in the ocean. With an average depth of 4 km, the world ocean covers about 71% of the surface of the planet and contains 97.6% of the world's world reserves known to us. Rivers and lakes contain 0.3% of worldwater reserves.
Glaciers are large moisture storage facilities, they are concentrated to 2.1% of world water reserves. If all the glaciers were melted, the water level on Earth would rise 64 m and about 1/8 of the sushi surface would be flooded with water. In the era of the glaciation of Europe, Canada and Siberia, the thickness of the ice cover in the mountainous locations reached 2 km. Currently, due to the warming of the land climate, the boundaries of glaciers are gradually receded. This determines the slow water level increase in the oceans.
The fact that the greatest density in the water is observed at a temperature of 4 ° C. When cooled fresh reservoirs in winter, as the temperature of the surface layers decreases, more dense weights of water are lowered down, and they rise in the bottom warm and less dense. This happens until water in the depth layers does not reach the temperature of 4 ° C. In this case, the convection stops, as heavier water will be at the bottom. Further cooling of water occurs only from the surface, which explains the formation of ice in the surface layer of reservoirs. Thanks to this, life does not stop under the ice.
Sea water freezes at a temperature - 1.91 ° \u200b\u200bC. With a further decrease in temperature to - 8.2 ° C, the precipitation of sodium sulfate begins, and only at a temperature of 23 ° C, sodium chloride falls out of the solution. Since part of the brine during crystallization goes from ice, salinity is less salinity of sea water. Many years of sea ice is so despicable that drinking water can be obtained from it. The temperature of the maximum seawater density is below the freezing temperature. This causes a rather intensive convection covering a significant waters of sea water and impellent freezing. The heat capacity of sea water is in third place after the heat capacity of hydrogen and liquid ammonia.
Snowflakes are usually in the form of six and twelve-beam sprockets, hexagonal plates hexagonal prisms. When the air temperature decreases, the dimensions of the crystals of the crystals decrease and increases the diversity of their forms. The peculiarities of the growth of crystals in the air are associated with the presence of water vapor in it.
Today, it is known for all people such a fact that water is a source of vital activity on Earth.
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Presentation work on the subject of "surrounding world", prepared by two teachers at once. This work is devoted to water, in the process of classes, schoolchildren must assess its role in nature and in the life of an ordinary person.
For the lesson by the teacher
Format
pPTX (PowerPoint)
Number of slides
Politova S. V., Chepelevskaya N. S.
The audience
The words
Abstract
Present
Purpose
Slide 1.
Environmental game from the series "Enter the nature of the friend"
Politova Svetlana Viktorovna - Chemistry Teacher;
Chepelevskaya Nina Stanislavovna - primary school teacher
MOU SOSH № 3 Cities Schelkovo Moscow region
Slide 3.
Guess the riddles
Drink me, pour me.
I need everyone,
Who am I so?
What to do not roll out
In solo, do not carry
In your hands, do not hold?
Slide 4.
Water on the planet Earth
We argue ...
Slide 5.
- We observe ...
- We draw conclusions ...
Water takes much more space than land
Slide 6.
Water in nature
- What is water?
Slide 7.
- In spring
- In a stream
- In puddle
- Fresh water
- In the lake
- In a swamp
- In a river
Slide 8.
Salty water
- In the ocean
- In the sea
Slide 9.
Slide 10.
Insects
- Who needs water
Slide 11.
Water inhabitants
- Who needs water
Slide 12.
- Who needs water
Slide 13.
- Animals
- Who needs water
- Birds
Slide 14.
- Properties of water
- Practical part
- Solubility
- The form
- Fluidity
- Transparency
- RESULTS
Slide 15.
Water shape
- Water has no form
Slide 16.
Water shape
- Water has no form
Slide 17.
Water color
- Water has no color
Slide 18.
Water transparency
- Water transparent
Slide 19.
Solubility in water
- Water is a good solvent
Slide 20.
Solubility in water
- Water is a good solvent
Slide 21.
Water states
- hard
- gaseous
- liquid
- liquid
Slide 22.
- Water in natural phenomena
Guess-Ka
Slide 23.
- guess a riddle
She grows down the head, grows not in the summer, and in winter.
But the sun is punishing her -
She will pay and die
Icicle
Slide 24.
- guess a riddle
Fluffy wat
Flowing somewhere.
The lower wool,
Those rain closer
Slide 25.
- guess a riddle
In a blue shirt,
Runs on the bottom
Slide 26.
- guess a riddle
In the courtyard is a stir -
From the sky, peas
Slide 27.
- guess a riddle
Without boards, without axes
Through the River Bridge is ready.
Bridge, like a blue glass!
Sliply, fun, light!
Slide 28.
Why dry items
Slide 29.
Slide 30.
Cycle of water in nature
Slide 31.
As a person uses water
Slide 32.
How water works per person
- Power plants
- Water mills
- Transportation of cargo
- Plants and factories
- Resting-place
Slide 33.
Water consumption
- 1890 year 1 bucket
How many people spent water
- 1914 7 buckets
- 2011 year 70 buckets
Slide 34.
Let's summarize
- Economist
Slide 35.
About l k o z o l d n in o and and
1 2 3 4 1 2 3 4 O o c a m in d in x
Crossword
PI C O D A
Slide 36.
Homework
- Focus a plaintive book
- Mersors' motto droplets
- "Bear water - it means to take care of life"
- File Book Mrs. Droplets
- Task: Click on the pencil
Slide 37.
Slide 38.
Slide 39.
View all slides
Abstract
The subject of the lesson: "Water".
Slide number 17.
Where does the water come from?
Water appears from the stream,
Brooks along the way collects the river,
The sea replenish the ocean margin:
It rises above ... for now
Does not turn into a cloud.
And clouds flying over us
All this is the name of the people:
Circulation of water in nature.
Puffy raindrops sailed;
Lei, rain, lei.
The rain is danced as alive;
Pey, Rye, Pey.
Drinks, drink, drink.
And a quiet rain, restless,
Pours, pour, pours.
If our hands are in Vaks,
If the nose sat down the blots,
Who then is the first friend
Will remove dirt from face and hands?
Without which mom can't
Neither cook nor wash
Without what, we say straight,
Man to die?
To rain rain from the sky,
So that gross grinding bread,
To float ships -
It is impossible to live without ... (water).
The lesson on the world around 1 class on the basis of the integration of ecology, chemistry and the surrounding world.
(Program A.A. Pleshakov "Surrounding World")
Chepelev Nina Stanislavovna is a primary school teacher.
The subject of the lesson: "Water".
The duration of the lesson: 45 minutes.
Purpose: to summarize students' knowledge of water, show that water is a unique natural substance.
Tasks lesson: teach to see, compare, analyze. Expand knowledge of water, her role in human life. Relieve careful attitude towards water, the responsibility of each person in solving environmental problems.
Form of training organization: front, group, steam room, individual.
Equipment: computer, multimedia prefix; Presentation "Water". Equipment for conducting experiments: chemical glasses of various volumes, test tubes, flasks, teaspoon, funnel, filter paper.
Presentation management. From the main slide (No. 2) on hyperlinks we go to the slides you need. Random transition slides canceled. Return is carried out by arrows. The presentation uses triggers.
Organizing time. Emotional attitude of students. Motivation of students.
Primary school teacher. Today we will try to look at the obvious, but we hope that it will seem to us and incredible. What do we want to find out today? Let's try to guess. Teacher Children makes riddles on water. It is required to guess the described object. This technique is used because the guessing expands the horizon of the child, teaches its observation, focuses on the leaving the subject. Slide number 3. Children read a riddle on the slide (frontal and pair shape of work), meeting together and show the willingness to answer (in advance children are harvested cards with water droplets on green and red background). A red card means: I do not know, green - the answer is ready.
Slide number 4. Initial teacher. Let's think where there is water on earth? Children answer: in the sea, in the river, in the lake, in the spring, in a swamp, in a puddle. We conclude together: there are a lot of water on the planet - the dryer takes only one third of its surface. It is surprising that the planet is called "Earth", and not "water." When people flew into space, they saw that our planet was blue. If you look at the globe (slide number 5), you can see that the bulk of the water is concentrated in the oceans and seas. She is bitter and salty in them.
Primary school teacher. Slide number 6. What is water on earth? We answer together: salty and fresh. Let's look at the presentation slide. It turns out almost all the water on the ground is salted, and only the small part is fresh.
Primary school teacher. Who needs water on earth? From the main slide, we go to the "Who needs water" by the hyperlink. Slides number 10-13. Frontal form of work. Children call: plants, insects, water inhabitants, man, birds, animals. We conclude: Water is something, without anything, no inhabitant of the planet Earth can do.
Practical part. Chemistry teacher. What properties is water? To respond to this question, it is necessary to conduct a study. Slide number 14. This slide shows the properties that substances possess. We read together: form, fluidity, color, transparency, solubility. Let's check, but does these properties have water? Go along the hyperlink to Slide No. 15. We have to prove: whether water has a form. To understand this we will do a simple experiment. In the vessels that have a different shape, naples a small amount of water from a large chemical glasses.
What do you observe? What form takes water in various vessels? We conclude: water does not have a form, it takes the form of the vessel into which it is poured. Slide number 16. Water flow. Which property we use: Purple water from one glass to another. A small amount of water is placed on the slide and watch. Conclusion: Water has such a property as fluidity.
Slide number 17.
Water color. We have to make sure: does water have a color? On our demonstration table there are three chemical cups. In the first - orange juice, in the second - milk, in the third - water. We observe, draw conclusions: in the 1st color orange, in the 2nd - white, in the third - there is no colors. Water does not have color, it means colorless. Slide number 18. Transparency. In three glasses of liquid: orange juice, milk, water. In turn, we lower the plastic spoon in each liquid. What we observe. In the first two glasses, we do not see the part that is immersed in the liquid, and in a glass with water we see a spoon completely. So: the two first fluids are not transparent, and the water is transparent, it allows us to observe the subject immersed in a glass with a liquid completely. Slide number 19. Solubility in water. In three chemical cups, we put different substances: salt, sugar, chalk. Mix thoroughly. What do you observe? Sugar and salt are well soluble in water, and the chalk in water does not dissolve. We conclude: water is a good solvent. Let's sum up. Slide number 20. On this slide there is a knowledge trinker. If we learned something new today, we can put this knowledge in our chest - they will be useful to us in further life.
Relax. Slide number 21. Chemistry teacher. Water is a liquid substance. Depending on the temperature, it changes its aggregate state: it turns into ice in the cold, and when heated is in steam. We are interested in learn about these transformations. Let's play our game "Guess-Ka" and find out what states the water is found in nature. Slide number 22. Each droplet is a mystery. By hyperlink, go to the tasks. Slides number 23 - 27.
Circulation of water in nature. Slide number 30. Children read the poem Andrei Usacheva:
Where does the water come from?
Water appears from the stream,
Brooks along the way collects the river,
The river fully runs on the square,
So far, finally, does not pour into the sea.
The sea replenish the ocean margin:
Thickened moisture above it, as sour cream,
It rises above ... for now
Does not turn into a cloud.
And clouds flying over us
The rain is shedding, low snow.
Snow will turn in the spring in the stream,
Brooks will run to the nearest river ...
All this is the name of the people:
Circulation of water in nature.
Chemistry teacher. The sun heats the surface of our planet. As a result, a huge amount of water evaporates. Couple of water rises upside the surface of the seas and oceans, rivers and soil. Water turns into steam at any time of the year, even in winter. The smallest droplets of water form clouds. The moisture accumulated in the clouds falls in the form of rain or snow and everything is repeated first. This is called a cycle of water in nature.
Fizkultminutka. Slide number 28. Children move little, staying in one position to a long time. For the prevention of fatigue and overvoltage during the educational process, physical attacks need to be carried out. Fizkultminutki B. primary school There are active recreation aimed at reducing fatigue in children, to enhance attention and increase the ability to more efficiently perceive the material.
Puffy raindrops sailed;
Lei, rain, lei.
The rain is danced as alive;
Pey, Rye, Pey.
And rye, leaning towards the grass green
Drinks, drink, drink.
And a quiet rain, restless,
Pours, pour, pours.
Each line is accompanied by movements.
How water works per person. Primary school teacher. Water plays an important role in human life, plants, animals. Why and why is water so necessary? Water is the most common fluid on the ground. A man needs a lot of water for life. Let's think where a person uses water? Hyperlink to slide number 31. We make conclusions together. Water helps produce electricity on power plants. Water transports cargo on rivers and seas, chalk grain, used in factories and factories. Clean water in rivers and lakes delivers many joy to people on vacation - you can swim, ride water skiing and bicycles, swim by boats. But where does a person take water? Transition to slide number 33. Fresh good water There are underground. In some places it follows on the surface - it is a spring. People dig wells, drill wells, use a water supply in cities where a lot of people live. Let's think about how to take the water if she needs it so much. The teacher brings to the idea that it should be carefully treated for water, nothing to spend in vain. In rural areas, people guard the springs, cover the well, so that the dirt does not get into them. In cities, people should also take water, economically spend it. Children along with the teacher argue that the water consumption is very increased and our previous generations spent less water than we.
Page of water connoisseurs. On Slide number 34 we see the environment, doctor, poet and economist. (Children come out in improvised hat with inscriptions: ecologist, economist, doctor, poet).
Ecologist: Industrial enterprises consume a lot of water, and it is becoming less and less. They pollute water, as a result, the moment will come when we will not have clean water. In many countries, clean water is sold in stores.
Doctor: Our health depends on what water we use. Due to the use of dirty water, a person may get sick or even die. Drink only filtered water. Better if you boil water before use.
If our hands are in Vaks,
If the nose sat down the blots,
Who then is the first friend
Will remove dirt from face and hands?
Without which mom can't
Neither cook nor wash
Without what, we say straight,
Man to die?
To rain rain from the sky,
So that gross grinding bread,
To float ships -
It is impossible to live without ... (water).
Economist: We use only clean and fresh water. Save water! Remember how little fresh water on Earth!
Crossword. On Slide number 35, we solve the crossword. Horizontally:
In the end, we get the word water (vertical location).
End of lesson. Summarizing. Water is a unique substance of nature that needs to be protected!
There is in the universe Little blue planet Earth. And this planet will live as long as there is an amazing substance - water. Today we made sure that water has unique properties. By changing nature, a person changes the basis of life - water, and no one can say: what terrible consequences can lead to a careless treatment of water. Water is a unique substance of nature that needs to be protected! Save water clean - it means to save your life.
Pure should be water oceans, sea, rivers.
And every smart person should remember this.
Primary school teacher. What awaits you, the future adult man? You are a resident of the planet Earth! You enjoy the ray of the sun and the wind, a drop of water on a flower, snowflake on his palm, a rain in the window. Remember that you have to do a lot of useful things to make life on your planet better. Learn to know, learn to create. Overcome the difficulties on your path and make it better every moment.
Homework. Establish a "plaintive Book of Mrs. Die". In it, complaints are unusual, they are in the form of drawings. Mother's motto droplets: "Keep water - it means to take care of life!"
Literature and used Internet resources:
- Borovsky E.E. Water in nature. A deficiency of clean fresh water. - M: Clean ponds, 2009. - 32 p.
- Aksenova Z.F. Enter in nature by a friend. - M: TC Sphere, 2008 - 128 p.
- Nikolaev S.N. Young ecologist. - M: Mosaic-synthesis, 1999 - 224 p.
- Ananyva E.G, Mirnova S.S. Land. Full encyclopedia. - M: Expo, 2008.-256 with
Abstract "Water on Earth" (with self-analysis)
geography teachers MKOU SOSH number 21
Objectives lesson:
Consolidate the knowledge of the atmosphere - to acquaint with three states of water and its properties; - Develop a careful attitude towards water wealth of our planet.
Equipment: - Globus, - Physical map Hemispheres - poster with rushes and water properties, - Glasses with water and milk for experiments, salt, sugar, spoon, - Drawings of children about water in nature
Educational film "Hymn Nature"
Presentation "Water in Nature"
Lesson preparation:
On the board it is written: each child's number has been prepared by a notebook / printed / to verify the homework.
During the classes
1. Checking homework.
Check the equipment of jobs .
Duty checks for weather calendars.
a) conversation.
What topic are we studied in previous activities? - Open the textbook on page 78-79 and work with questions over the headings.
b) Individual work in working notebook . The teacher reads each task, and the guys fill the workbook.
At the end of the work of Fizkultminutka.
2. Setting the purpose of the lesson.
Without many minerals, it's hard for us to do. But there is one wealth, without which it is impossible to do. What is this wealth, we learn from the riddles.
- "What is not to roll out into the mountain, do not carry in the hands and do not hold in your hands?" (Water).
- Why not roll out in the "Mountain"? (Flowing down)
- Why don't you get in "Single?" (Through hole counting)
- And in the "hands not to keep" why? (Turns out)
Today in the lesson we will talk about the water. The topic of our lesson is "water on earth". (The topic teacher writes on the board, and children in notebooks).
3. Explanation of the new material.
but). The role of water in human life, plants and animals.
Guys, what role does the water play in the life of a person? Why and why is it necessary? How does a person use water? (Wash, drinks, prepares food, washes the dishes, the floors, erases, bathes, in heating systems, etc.).
The blood of a person consists of 98% of the water, the muscles of a person - by 70% of the water and in general the human body, the brain, body tissue is greater than half consist of water. The lack of water for man is more dangerous than starvation: without food a person can live more than one month, and without water - just a few days. A person per day consumes from 3 to 6 liters of water (depending on climate).
Water is necessary and animals, and plants. All plants "drink" water and get the necessary substances for growth and development. Water is contained in the root, leaves, trunk, tree cortex.
For example, to grow 1 kg of potatoes, 300 liters of water is necessary.
Without water, the plants fade and may die. And water is also needed for life.
What conclusion can we do?
Conclusion: Water is needed for nutrition and cooling to all plants, animals, people. Without water there will be no life.
b) Water forms an aqueous shell by our planet-hydrosphere (from the Greek words "Gira" - water, "sphere" -sar.
Before you, the globe is the earth model. It is the same conditional notation as on the map. Recall what is the blue and blue color? (Water). Green and brown? (Plains and mountains).
On the globe is the mainland or land. Split globe around the axis. What color prevails? (blue). What follows from this?
On Earth, the oceans are most occupied by the water: quiet, Atlantic, Indian and Northern Arctic. (Teacher shows on the map Oceans, children -on the map In the textbook p. 82-83).
On the board, draw a diagram:
Three quarters Globe Busy water.
4. "Water in nature" show presentation.
Guys. You have now seen where in nature you can meet water? (Rivers, lakes, seas, springs, wells, puddles, dew, rain, fog, clouds, ice, snow, hail, frost)
5. Three water states.
Here you said that the cloud (fog), dew, the snow is water. But something is unlike dew, snow, fog. What is unlike? (Cloud, fog is pairs (water in the form of steam), dew - water in liquid form, snow - water in solid form, crystals).
What substance is water: liquid, solid or pairs?
Output. Water is a special mineral, since it can be in three states at the same time.
On the board and in notebooks a diagram is drawn.
Give examples where at home can be seen in the form of a liquid (from the crane), in the form of a pair (cook food - pairs), in solid form (in the refrigerator)?
Interesting if water can go from a liquid state in vapor? (Yes).
Under what conditions does this happen faster? (It must be heated).
And from liquid into solid? (Cool).
And the opposite is solid in liquid? (It is necessary to heat, because ice and snow melted in warm).
And from the hard state to go to par? (Yes)
Give examples. (Winter dries mom lingerie on the balcony. It immediately freezes, that is, liquid water becomes ice, but everything dries (almost), therefore, solid water can go to par.)
Can steam be fluid again or go to a solid state? (Yes, if you cool the clouds, drops in the bathroom on the ceiling, hail).
Conclusion: Water is a wonderful mineral. It can be immediately in three states and move from one to two others. There is no other such useful!
Properties of water.
Consider the properties of water and determine what properties it possesses.
On the board poster "Water properties". The listed properties are discovered gradually as they determine as a result of experiments.
What word is encrypted? How did you guess?
Let's run experiments and solve what properties of water are hidden on the poster.
Experience number 1. What happens to water if I caught it on the glass? (Spread)
Water does not hold shape. Pasting water from cans to a glass. What form did the water accepted? (Shape glasses).
Output: Water does not have a form and acquires the form of the vessel in which it is poured.
What property of water allowed us to transfuse her from the cans into the glass? (Fluidity).
Experience number 2. Two glasses - with milk, with water, spoon. What can be said about the color of milk? (White) and water? (Colorless) Spoon immersed in a glass with water. Spoon see from all sides.
Output: Consequently, the water is transparent.
Experience number 3. I take sugar, salt. What of them is minerals? (Salt) Why not sugar? (Manufactured by people). Sugar and salt on a spoon put in glasses with water, mixing. What happened to salt and sugar? (Melted) Why? (Water dissolved them)
Output: Water is a universal solvent. It dissolved completely salt and sugar and remained transparent. For example, one liter of ocean water is on average, 35 grams of salt (most of all cooks), which gives it a salty taste and makes unsuitable for drinking and use in industry and agriculture.
Experience number 4. If we sniff out simple water, then what is the smell? And taste?
Output: Water without smell and without taste.
What kind of water will seem tastier rain, plumbing or spring? Why? You said that water does not have taste.
Rainwater does not have the necessary organisms of salts, so it seems tasteless. Water water is poorly cleaned, you need filters - means for water purification. Rodnikova- dissolves minerals underground, passes through the sand (natural filter), but it is better to boil better before use.
What is the difference between mineral water from ordinary?
Fairy tales often speak of living and dead water. Most likely these fairy tales were born from life. Do not really have water with a lifeful, therapeutic force?
Student's story about mineral water (advanced job) .regional component.
Distribution of water on earth (drawing in tutorial p.80)
6. Careful attitude towards water.
There is a lot of water on earth, but it becomes less and less. This is not because the water reserves are depleted. And why? Above water hung a threat of pollution. Who pollutes it?
Plants, factories, HPP consume a large amount of water and at the same time pollute it with various products of waste. Various poisonous substances fall with waste (used) waters of enterprises in rivers and lakes. In the water, life, fish, plants, animals die. Refrigerated water poisoned air, become a source of severe diseases. The river "sick", its water can not be used by a person.
Water must be preserved! Taking care of the purity of water, we care about your health, the beauty of the surrounding nature. In our country, a number of laws aimed at protecting waters have been adopted. They are followed by state authorities, environmentalists.
And how are you guys, can you take care of the purity of the reservoirs? (Do not throw banks, bottles, other trash. Economically spending water).
You can show posters, drawings that encourage water.
"Close the string of the faucet so as not to emerge the ocean." "Economically water leu, to rummage by water.
7. Learning read poems and show their drawings.
The hydrosphere is studying
I answer questions.
Water - Mineral, Water - Ash - Two - Oh,
Water in the universe above all.
Let me ask you then
What condition is water?
/ Answers students - in solid, liquid and gaseous. /
Asked the next baby neighbor
At the rod rinse from the crane:
Where are you from?
Water in response:
From far;
From the ocean!
Then the baby walked in the forest
Rosoy sparkled the whole glade
Where are you from?
Asked Dew.
Believe and - I
From the ocean!
On the field lay fog gray
The baby asked and the fog
Where are you from?
And I, and I am a friend of the ocean!
Surprisingly not?
In soup, tea, in every drop,
In the wake of ice
And in the rain,
And in Rosinka and the river
We will always respond
Ocean water!
8. Work on the textbook (p.80-81, p.84-85)
9. Summing up the lesson - the presentation "Water in Nature".
Loculated material
In our region, cold, hot, fresh and mineral underground waters are common. 12 types of mineral water of our region are known all over the world.
Unique natural underground drug factories are Pyatigora Water.
In the cracks of the failed volcanoes, water saturated with hot solutions and gases coming from the deep foci of frozen magma, and then rushed to the earth's surface, forming dozens of sources at the foot of the mountains.
Our area has underground inter-plastic waters:
thermal, fresh, salted and mineral.
Thermal waters have a temperature of 90 degrees, with a very high salt content, these waters are still small.
Mineral waters were not fully studied and not taken into account, but the local population has long used. In the area of \u200b\u200bthe village of Podgorne, there is a source of attending skin diseases,
In the village, nezloblany and in the area of \u200b\u200bGeorgievsky Melkalkinat have sources attending gastrointestinal tract. In the area of \u200b\u200bMount Lysoy - diseases of the musculoskeletal system. In the area of \u200b\u200burban lake, a hydropathic is built on iodine-bromide waters
Water (hydrogen oxide) binary inorganic connection chemical formula H 2 O. Water molecule consists of two hydrogen atoms and one oxygen, which are interconnected by a covalent bond. Under normal conditions, it is a transparent liquid, there is no color (in small volume), odor and taste.
The spread of water on Earth is approximately 96.5% of water falls on oceans, 1.7% of world stocks are groundwater, another 1.7% for glaciers and ice caps of Antarctica and Greenland, a small part in rivers, lakes and swamps, and 0.001% In the clouds (the particles of ice and liquid water suspended in the air are formed). Interesting fact that the water mantle of water is largely contained more than the amount of water in the world ocean.
Three aggregate water states Liquid gaseous solid water on Earth can acquire various forms that can simultaneously adjoin to each other: water vapor and clouds in the sky, sea water and icebergs, glaciers and rivers on the ground surface, aquifer in the ground.
High specific heat capacity water has the highest specific heat capacity. Physical quantity, numerically equal to the amount of heat that needs to be transmitted by a body weighing 1 kg in order for its temperature to change by 1 ° C, is called the specific heat capacity of the substance.
The main climate thermostat due to high heat capacity water in the seas and oceans, heating in summer, absorbs a large amount of heat. Therefore, in areas located near the reservoirs, the summer is not very hot, and in the winter it is very cold. This is due to the fact that in winter the water cools and gives a large amount of heat.
Water steam is an essential role in the life of plants play the optical properties of water vapor. The fact is that water vapor strongly absorbs infrared rays with a wavelength from 5.5 to 7 microns, which is important for soil protection from frosts. An even more effective tool from frosts is the loss of dew and fog formation: the condensation of moisture is accompanied by the release of a large amount of heat that delays further cooling of the soil.
Biological role Water plays a unique role as a substance that determines the possibility of existence and the very life of all creatures on Earth. The human body consists of 70-80% water, in some plants water contains up to 90% or more. On average, plants and animal organism contain more than 50% of water
The universal solvent Water acts as a universal solvent in which the main biochemical processes of living organisms occur. Each molecule of the soluble substance is surrounded by water molecules, and a positively charged area of \u200b\u200bthe soluble molecule is attracted by oxygen atoms, and negatively charged hydrogen atoms. Since water molecule is small in size, many water molecules may surround each soluble substance molecule.
Water is key to creating and maintaining life on Earth, in the chemical structure of living organisms, in climate formation and weather. It is an essential substance for all living beings on water is necessary for the lives of all without exception of single-cell and multicellular living beings. Without water, there would be no life on earth.
Used literature and materials of sites: Baltecopool.ru DIC.academic.Ru Teme-Mirovoy-Okean-Tixii / Teme-Mirovoy-Okean-Tixii / Water-Posters_i _.htm Water-posters_i _.htm ru.wikipedia.orgveod physics. 8kl. : Education. For general education. institutions / A. V. Pryskin.
