Presentation of what is water. Water presentations
Description of the presentation on individual slides:
1 slide
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The presentation was compiled by the teacher of the MBOU "Gymnasium No. 1" of the Kovylkinsky municipal district of the Republic of Moldova Kostkina A.N.
2 slide
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Her Majesty - Water From a birch leaf, a drop rolled down near me, It fell into a babbling brook, And it rushed ringing. And flashing darted into Lena, In the great water flowed. What will happen to the drop? I dont know! Where will it go, where will it land? But all the oceans are made of such small drops. And the drops crush the rocks, They thunder with formidable ramparts.
3 slide
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Everyone knows what water is. It is needed for cooking and other household needs for the operation of industrial enterprises, for growing good crops. Water has many amazing properties that make it unlike all other substances. But among them there is one most unusual - this is her immortality.
4 slide
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The role of water is also great in the life of nature: there is no life without water. The living organisms of our planet have adapted to all kinds of conditions: to complete darkness and enormous pressure at the bottom of the oceans, to 70-degree heat in the deserts and to 70-degree cold in Siberia and Antarctica. But no living being can do without water.
5 slide
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6 slide
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Without water there can be no bright flowers, no green trees, no birds singing, no golden fields of wheat.
7 slide
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All plants and animals contain water, and our own body is 3/4 water. Did you know that when a person loses 1-1.5 liters of water (this is about 2% of body weight), a feeling of thirst appears. When the body loses 6-8% of moisture, a person falls into a semi-conscious state. The loss of 10% of water causes hallucinations, the swallowing reflex is disturbed. If the loss of water exceeds 12%, the person dies.
8 slide
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Water is the most abundant substance on earth. ¾ of the surface of our planet is occupied by seas and oceans. If all the water is distributed in an even layer over the globe, then such a World Ocean would be up to 4 km deep, and if all the water was collected in one drop, then its diameter would be 1500 km. The main water reserves on Earth are concentrated in the seas and oceans - about 1.4 billion km. cube
9 slide
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Fresh water is found mainly in glaciers - more than 30 million cubic kilometers, as well as in rivers and lakes - about 2 million cubic kilometers, the atmosphere contains 14 thousand cubic kilometers. water vapor. But it is constantly consumed both in life processes and in production. From year to year more and more of it is spent, and more and more often and more alarmingly they talk about the lack of water. We are not talking about water in general, but about fresh water, without which a person cannot do without. So what are the causes of water shortages? Decreased flow of rivers due to deforestation along the banks. Ruthless pollution. Sources of pollution: domestic, industrial and agricultural wastewater, thermal and nuclear power plants. Wastewater from industrial enterprises contains heavy metals such as mercury, lead, cadmium, once in water bodies, they cause the death of plankton and mollusks, which are involved in water self-purification.
10 slide
Description of the slide:
Leaks of oil, gasoline, kerosene, fuel oil pollute water bodies. Very dangerous radioactive contamination. The so-called thermal pollution of water bodies has increased, due to which fish move to other water bodies. The ingress of polymeric materials causes littering of the water areas of ports, the coasts of reservoirs. There are cases of seals dying from suffocation with plastic bags. Commonly used synthetic detergents, even in small quantities, are toxic to aquatic life. The health of humans and animals directly depends on the quality of the water consumed; The purer the water, the better the ecology and the more beautiful the native nature; Which is better - spend a lot of money on water treatment or try not to pollute it; Although water is a constantly renewing resource due to the cycle, dirty and poisoned water is a deadly threat to all living things.
Targets and goals
- Develop a set of computer slides for demonstration in a chemistry lesson in grade 8
- Consider the basic physical and chemical properties of water, the composition of the water molecule
- Learn additional material on the topic
- Show the importance of water in nature, for humans, the most interesting applications of water
- Study the material of multimedia teaching aids in chemistry
The only substance in nature that exists
in three aggregate states
liquid state
solid state
gaseous state
Each water molecule consists
from two hydrogen atoms and one oxygen atom ,
interconnected by chemical bonds
water molecule
oxygen atom
hydrogen atoms
Aggregate states of water
gaseous
- colorless, tasteless, odorless, transparent
- has low electrical conductivity
- t bale \u003d 100 o C, t pl \u003d 0 o C
salt molecule
water molecule
1. Interaction of water with active metals
Li+H 2 O
LiOH+H 2
2NaOH + H 2
2Na+H 2 O
Sodium hydroxide
KOH + N 2
K+H 2 O
2. Interaction of water with non-metals
CO + H 2
C + H 2 O
Water gas
3. Interaction of water with basic oxides
Na 2 O + H 2 O
Sodium hydroxide
sodium oxide
four . Interaction of water with acid oxides
H 2 CO 3
CO 2 + H 2 O
Carbonic acid
Cold air
cloud transferred
crystals
ice
air current
Water drops
Warm air
Animals
Plants
People
hail
Rain
Snow
Precipitation
Soil.reservoirs
Directly in the form of a free liquid (different drinks or
liquid food) an adult consumes on average per day
about 1.2 liters of water (48% of the daily value) .
cereals contain up to 80% water, bread - about 50%, meat - 58-67%,
fish - almost 70%, in vegetables and fruits - up to 90%
Most of the water is excreted from the body through the kidneys,
an average of 1.2 liters per day - or 48% of the total volume,
as well as through sweating (0.85 liters - 34%).
Part of the water is removed from the body during breathing (0.32 liters per day - about 13%)
and through the intestines (0.13 l - 5%).
Your weight (kg.)
Daily water requirement, l.
At low physical activity
With moderate physical activity
At high physical activity
The sci-fi future is slowly but surely making its way into our homes. And now you can easily buy yourself a watch that receives electricity for its work from ordinary water.
How do these miracle clocks work? Inside is a converter that "extracts" electrons from the molecules of the liquid, and works like a fuel cell for watches. The water consumption is very small. It is reported that one refueling of the tank is enough for "several weeks" of uninterrupted operation.
Japanese explorer Masaru Emoto(Masaru Emoto) provides amazing evidence for the information properties of water. During his work, he took more than 10,000 photographs, some of which are published in his books "The Messages from Water" 1, 2 and "Water knows the answer." Dr. Emoto used the Magnetic Resonance Analyzer (MRA) for several functions including water quality analysis. He noticed that no two samples of water form exactly the same crystals, and that the shape of the crystals reflects the properties of water .
Antarctic ice
Anthem of Moscow
Russian anthem
Water after baptism
Water before baptism
Spring water
Hard Rock
Music by Beethoven
Spring in Troparevo
Bibliography
- Guzey L.S., Surovtseva R.P., Sorokin V.V., "Chemistry-8", M., Bustard, 2003
- Multimedia textbook "Chemistry" Grade 8, M., Enlightenment, 2002
- Educational collection 1C "Chemistry for all-XXI", M., 2004
Nomination "Multimedia technologies in the pedagogical process in preschool educational institutions"
During preschool childhood, the child discovers the world of nature. Supporting the natural interest of preschoolers in all living things, the teacher leads children from getting to know nature to understanding it.
The ability to learn about the world around the child provides activity, as it is an important condition and means of cognition. To be active means to be active!The fuller and more varied the children's activity, the more significant it is for the child, the more successful his development is.
Prominent domestic psychologist S.L. Rubinstein considers observation as the result of meaningful perception, during which the development of mental activity takes place. He connects the development of different forms of perception and observation with content. The question of the content of observations is important. - what the child can and should see, what features of natural objects to notice.
Target: This presentation provides visibility - a visual row in the classroom. Introduce children to the properties of water.
Tasks: the work on the presentation is structured in such a way that after a conversation (with slide views) about the need for water for all living things, it will smoothly turn into the topic of the lesson. The teacher, moving step by step, tells where water meets, conducting experiments, clearly demonstrates the phenomena of inanimate nature on slides. Develops logical thinking, visual and auditory attention, creative imagination.
Efficiency: consolidates knowledge about inanimate nature, contributes to the creation of an information and communication environment, and meets modern requirements.
Practical significance:
- A visual introduction to the need for water for humans, animals and plants.
- Acquaintance with the phenomena of inanimate nature, with the properties of water.
- Poetry part.
Place of use of multimedia material: can be used both by teachers of preschool institutions as a visual material in a lesson on familiarization with a natural phenomenon - water, and by parents to organize cognitive and research activities of children at home.
Equipment: Computer, multimedia projector.
STUDY PROCESS
Organize children's attention, create game motivation. A SCIENTIST FROM THE MAGIC LABORATORY enters to the sounds of "Noise of water" in a robe and a rectangular academic cap.
Hello guys! I came to visit you, my name is Scientist, and today I will tell you about one of the greatest wealth of our planet! But first, solve the riddle:
Introduction to the game situation, preparing children for the topic of the lesson
She is in the lake and in the puddle
She is spinning like a snowflake over us,
She is boiling in our kettle,
She runs in the river, murmurs ( water).
Guess what we're going to talk about today? We will talk about water. I want to invite you to my magical laboratory and tell you about the great miracle - water. There we will become young scientists. We will conduct experiments to understand how unique it is. Do you know what a laboratory is? (This is the place where scientists conduct experiments and set up experiments).
And to get there you need to answer a few questions.
SLIDES No. 2,3,4,5,6,7,8.
Why do people need water? ( A person drinks water, washes, cooks, waters vegetable gardens, orchards, gets rid of dirt with water).
But not only humans need water! ( Animals, plants, insects, birds and fish need water. Living beings cannot survive without water.)
That's right, now let's play a game.
I gr a "Who needs water?"
Each child chooses a picture depicting various objects of nature (an animal, a plant, a person - a small child, a woman, etc.) and tells why the person in the picture needs water (other children can add).
Well done! Let's go to our laboratory, here you will find out what properties it has, but first, let's remember the rule for handling water:
Kohl we deal with water
Let's roll up our sleeves boldly.
Spilled water - no problem
A rag is always at hand.
Let's stand in a circle, join hands and close our eyes.
(SD music "Sound of the surf" sounds).
Here we are in the laboratory of water!
SLIDES No. 9,10 (magic laboratory, globe).
It is difficult to find a place on earth where there would be no water. Water is everywhere: in the oceans, seas, rivers and lakes. Water is contained in the earth, water is in plants, animals, even in man. Look at our planet as it looks from space. Why is there so much blue on it? (These are seas, oceans, lakes, rivers, it's all water).
That's right, now:
Have you heard of water?
They say she's everywhere!
Like an icicle freezes.
Creeps into the forest with mist.
It's called a glacier in the mountains.
Ribbon silver curls.
We are used to the fact that water -
Our companion always!
SLIDES #11, 12, 13.
Tell me what you know about water, where it is found in nature (in seas, oceans, rivers, lakes, swamps).
SLIDES No. 14,15,16,17.
Describe what phenomena of inanimate nature are associated with water. (Dew, fog, cloud, steam, rain, snow, ice, frost).
Conclusion: water is one of the most important substances for nature, it is found everywhere, even inside a living organism. Water not only gives water, but also feeds, you can’t cook a single dish without water. Water generates electricity, helps to transport goods. Although it seems that there is a lot of water on the planet, living organisms need only fresh water, and there is not much of it in nature. And that's why it needs to be protected.
Activate children's knowledge about water, develop social skills in children, prove the correctness of their opinion, consolidate children's knowledge about the properties of water.
SLIDE #18 ( three states of water).
Let's see what state water can be in nature.
EXPERIMENT No. 1 "WATER-LIQUID".
Pour water from one glass to another (from a smaller one to a larger one). Here you can see how the water flows. It means that it is LIQUID and does not have its own form.
SLIDE #19 (liquid water).
EXPERIENCE No. 2 "WATER IS STEAM" (Scientist brings a thermos of hot water).
What comes out of a thermos when water boils? (Steam)
Where did the steam come from in the jar - did we pour water?
Conclusion: When heated, water turns into steam.
SLIDE number 20 (pairs).
EXPERIMENT No. 3 "STEAM IS WATER" (brings cold glass to a jet of steam).
Look what happened to the glass. Where did the water droplets on the glass come from? When the steam fell on the cold glass, it again turned into water.
Conclusion: when cooled, steam turns into WATER.
SLIDE No. 21 (steam turns into water when cooled). This is how it happens in nature.
Fitness minute.
Making scientific discoveries is not easy, so there are breaks in the laboratories for rest. It would be nice for us to get some rest. What do our young scientists think? Let's move away from our lab tables and walk onto the carpet.
(Children are located on the carpet in random order.)
Stretching the lower back, we will not be in a hurry.
Turn right, turn left, look at your neighbor.
(turns in different directions)
To become even smarter, we twist our neck a little.
One and two, one and two, dizzy.
(Rotation of the head to the right and left)
One, two, three, four, five. We need to stretch our legs.
(squats)
Finally, everyone knows how to always walk in place.
(Walking in place)
There are benefits to warming up! Well it's time to sit down
Every day the sun heats the water in the seas and oceans - just like it is heated in kettles of water.
Water turns into steam. In the form of vapor, tiny, invisible droplets of moisture rise into the air. The higher the steam rises, the colder the air becomes. The steam turns back into water. The droplets all come together and form a cloud.
SLIDE #22 (cloud).
When there are a lot of water droplets, they become very heavy for the cloud and rain down on the ground.
SLIDE #23 (rain).
What do water droplets turn into in winter? (In snowflakes).
EXPERIENCE No. 4 "WATER - SOLID". (Ice molds are brought in, each child is given an ice cube).
In winter, another amazing phenomenon occurs on the surface, the water turned into ice. See how the ice is SOLID, which means that water can become SOLID.
SLIDES №24,25,26 (snowflakes, ice).
Now let's hold it in our hands, what's going on? From the warmth of our palms, it began to melt as if heated, and again turns into a LIQUID STATE
This is how the water repeats its path. This is called the water cycle in nature.
(The use of an artistic word as a means of consolidating the knowledge gained about the water cycle in nature).
SLIDES No. 27,28 (water cycle in nature).
Water travels in nature
She never disappears.
It will turn into snow, then into ice,
It melts and goes on a hike again.
Suddenly up into the sky
It will turn into rain.
Take a look around
Take a look at nature.
Surrounds you everywhere and always
This magical water.
Let's take a break and do some self-massage again.
Pure water flows
We know how to wash ourselves.
(Children rub their hands together).
My nose, my mouth,
(rubbing the wings of the nose).
My neck, my ears.
(rub, earlobes with fingers).
After we wipe dry.
(stroke forehead).
Well, my dears, our trials are coming to an end. Are you interested in being scientists? (Yes). Let's sum up our knowledge gained. Now you guys know what water is like? (Liquid). And if you freeze it, what does the water turn into? (Into the ice). What about when heated? (in pairs).
Reflection
Now I will award each of you with a badge, it says "Young Scientist". This means that you have learned a lot of new things, but do not stop there, and you will continue to learn a lot of new and interesting things about our planet called Earth. Conduct wonderful and unusual experiments.
(Adhesive stickers in the form of droplets on the chest of each child. Create a condition for the psychological comfort of children).
And before you leave my magical laboratory, I want to treat you to some spring water.
Droplets travel not only through the air and land, but also go underground. There they absorb all the healing properties of the earth and come to the surface in the form of springs. This water becomes the most healing. It gives vitality and strength to all living things.
SLIDE No. 29 (springs). (Treating children with spring water)
Now let's hold hands again, close our eyes and listen to the sound of the water, and move to our d / s. Goodbye, my young scientists, see you soon!
(music "The sound of water").
Presentation for the lesson
slide 2
Targets and goals
- Develop a set of computer slides for demonstration in a chemistry lesson in grade 8
- Consider the basic physical and chemical properties of water, the composition of the water molecule
- Learn additional material on the topic
- Show the importance of water in nature, for humans, the most interesting applications of water
- Study the material of multimedia teaching aids in chemistry
slide 3
Water in nature
slide 4
Aggregate states of water
The only substance in nature that exists in three states of aggregation:
- liquid state
- solid state
- gaseous state
slide 5
water molecule
Each water molecule consists of two hydrogen atoms and one oxygen atom connected by chemical bonds.
Oxygen atom + Hydrogen atoms = Water molecule
slide 6
Physical properties of water
Aggregate states of water:
- Liquid (water)
- Solid (ice)
- Gaseous (steam)
Physical properties of water:
- colorless, tasteless, odorless, transparent
- has low electrical conductivity
- t bale = 100 °C, t melt = 0 °C
Slide 7
Water is a solvent
Slide 8
Chemical properties of water
1. Interaction of water with active metals
- 2Na + H2O = 2NaOH + H2 (Sodium hydroxide)
- Li + H2O = LiOH + H2
- K + H2O = KOH + H2
Slide 9
2. Interaction of water with non-metals
- C + H2O = CO + H2 (water gas)
4. Interaction of water with acid oxides
- CO2 +H2O = H2CO3 (Carbonic acid)
3. Interaction of water with basic oxides
- Na2O + H2O = 2NaOH
Slide 10
The water cycle in nature
slide 11
The value of water for humans
Directly in the form of a free liquid (different drinks or liquid food), an average adult consumes about 1.2 liters of water per day (48% of the daily requirement). Cereals contain up to 80% water, bread - about 50%, meat - 58-67%, fish - almost 70%, vegetables and fruits - up to 90%
slide 12
Basically, water is excreted from the body through the kidneys, an average of 1.2 liters per day - or 48% of the total volume, as well as through sweating (0.85 liters - 34%). Part of the water is removed from the body during breathing (0.32 liters per day - about 13%) and through the intestines (0.13 liters - 5%).
slide 13
Daily water requirement
Slide 14
Water is fuel
The sci-fi future is slowly but surely making its way into our homes. And now you can easily buy yourself a watch that receives electricity for its work from ordinary water.
How do these miracle clocks work? Inside is a converter that "extracts" electrons from the molecules of the liquid, and works like a fuel cell for watches. The water consumption is very small. It is reported that one refueling of the tank is enough for "several weeks" of uninterrupted operation.
View all slides
"States of water" - The smell of water. "Sinking - not sinking." In the cold, water particles move more slowly, so the water turns into ice. Why doesn't an egg sink in salt water? Solutions. Participants: children of the senior and preparatory groups. Water properties. Information resources: Liquid. Subjects: Cognitive development. Where water is found.
"Taiga" - Squirrel - flying squirrel. Flying squirrel. Fir. Name the tree: “Tall, slender, with yellowish-reddish bark. Taiga plants. Spruce. Primary school teacher of school No. 602 Kondrashova M.A. Pine needles are long, sitting in pairs. Winter in the taiga is cold. Natural conditions of the taiga. Cedar. Taiga animals. Larch.
"Chemical phenomena" - What happens to the substance? Continue building general communication skills. What phenomenon is shown? The work was completed by: Zaeva N.V. teacher of biology, MOU "Secondary School No. 41". What are you watching? What are the process conditions? What chemical phenomena take place around us? Expand knowledge about the structure of matter.
"Ice deserts" - Saratov. Ice deserts of the Arctic and Antarctic. Completed by: Baranova Elena Student of Lyceum No. 62, 3 "G" class. Most of Antarctica is occupied by the continent of Antarctica. The Arctic and Antarctic surround the Earth's North and South Poles. Saxifrage. For several months, day and night light, but not warm. Arctic and Antarctic.
"Minerals" - Experience "Fragile twig" was conducted by Krutskikh Elena 1999. How and where are minerals formed? Scientists from all over the world come here in search of new minerals. Mineral color. Mohs hardness scale. Rhodonite. Karpinsky Alexander Petrovich is a famous Russian geologist.
"Lesson The water cycle in nature" - Three states of water. A sunflower drinks 20 buckets of water in a summer. Do you think there is a lot of water on our Earth? What are the states of water? And how can you, children, save water? Animal trails in the forest lead to water bodies. Water exists in nature in three states: liquid, solid and gaseous.
In total there are 8 presentations in the topic
