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1 слайд
Our Nature is beautiful!
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But what are we doing?
Just look!
We are
polluting the air
11 слайд
But what are we doing?
Just look!
Forests are destroying by fires
12 слайд
But what are we doing?
Just look!
The litter is everywhere
13 слайд
But what are we doing?
Just look!
We are desroying our fragile planet
14 слайд
The Man
and Ecology
The Topic of the Lesson:
15 слайд
TAKING CARE OF THE EARTH
IS EVERYBODY’S BUSINESS
16 слайд
Video-Information
17 слайд
Ecological problems
Defore
station
Polluted
water
Polluted
air
Fires
Litter
Trees cut down
![Revision of Unit II "Nature and Ecology"](https://documents.infourok.ru/be201859-a302-45ef-8bbb-fdad387fca97/0/slide_18.jpg "Revision of Unit II "Nature and Ecology"")
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Revision of Unit II "Nature and Ecology"
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Choose & Answer
20 слайд
What does the word
“ECOLOGY” mean?
Ecology is a science which studies the relationship between all forms of life on our planet
21 слайд
What does the word
“ENVIRONMENT” mean?
Environment is our planet, its population, nature, animals, birds, fish and atmosphere
22 слайд
Where are rainforests?
Rainforests are in the South America, Africa and South East Asia
23 слайд
What language does the word “ECOLOGY”
come from?
The word “ECOLOGY” comes from the Greek “oikos” which means “home”
24 слайд
What is happening
to the rainforests?
Rainforests are in danger because the trees are cut down and we lose a lot of species every day
25 слайд
What kind of
ecological problems in Kazakhstan do you know?
Show them on the map
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Instructions to the E-Text
Write out underlined words;
Make a stress pattern;
Listen to the full version of the text;
Read the text;
Translate the text into Kazakh.
29 слайд
Active Vocabulary
30 слайд
Instructions to the E-Text
Write out underlined words;
Make a stress pattern;
Listen to the full version of the text;
Read the text;
Translate the text into Kazakh.
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Presentation of Projects
34 слайд
A Trip of a little drop
Topic of the Project:
Prepared by: Ramazanova Bekzada
Circulation of water
Problem:
35 слайд
A Research
fairy-tale
Type of Presentation:
One day a little drop Dolly had a rest with her brothers and sisters on the water-plant in the sea. Suddenly the wind had blew. At that moment the wind had lifted Dolly with her relatives up in the sky. Then Dolly realized that she was laying in a grass. She understood that she was far from her native place.
36 слайд
Suddenly the wind had lifted her again and carried to the mountains. On the mountains she stayed not so long. Suddenly the clouds had gathered and our Dolly had joined her relatives and felt down on the ground. So it started to pour a rain.
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All the drops fell down into the river. Then the stream carried them back to their native place, to the sea. Dolly was very happy to have a long trip. And she hopes to have a trip again
38 слайд
Conclusion:
How does the water circulate?
Water Steam Cloud Rain River
39 слайд
Water make a circular trip:
First, water turns into steam, then will form a cloud.
From the cloud it starts to rain
Then drops get to the river
The stream will carry the water back to the sea
40 слайд
Presentation of Projects
41 слайд
What is Acid Rain
& What cause it ?
Topic of the Project
Prepared by Temirkhanova Madina
42 слайд
Acid Rain:
Do we need to start
wearing a rainhat ?
Hypothesis:
to generalize knowledge about acid rains;
to carry out analysis of measurements of acid rains;
to establish the reasons of formation of acid rains;
to understand consequences of acid rains
Objectives:
43 слайд
The Term of “Acid Rain”
How do we measure Acid Rain?
Causes of Acid Rains
Geographic distribution of Acid Rains
Effects of Acid Rain
How does acid precipitation affect stone and buildings
Conclusion
Plan of the Project:
44 слайд
The Term of “Acid Rain”
“Acid Rain” is a broad term used to describe several ways that acids fall out of the atmosphere. A more precise term is acid depositions, which has 2 parts: wet and dry.
Wet deposition refers to acid rain, fog, and snow. As this acidic water flows over and through the ground, it affects a variety of plants and animals. The strength of the effects depend on many factors, including how acidic the water is, the chemistry and buffering capacity of the soils involved, and the types of fish, trees, and other living things that rely on the water.
Dry deposition refers to acid gases and particles. About half of the acidity in the atmosphere falls back to earth through dry deposition. The wind blows these acidic particles and gases onto buildings, cars, homes, and trees. Dry deposited gases and particles can also be washed from trees and other surfaces by rainstorms. When that happens, the runoff water adds those acids to the acid rain, making the combination more acidic than the falling rain alone.
45 слайд
2. How do we
measure Acid Rain?
Acid rain is measured using a scale called "pH." The
lower substance's pH, the more acidic it is.
Pure water has a pH of 7.0.
Normal rain is slightly acidic because carbon
dioxide dissolves into it, so it has a pH of about 5.5.
As of the year 2000, the most acidic rain falling in
the Unites States has a pH of about 4.3.
46 слайд
3. Causes of Acid Rains
Acid rain is a uniquely human - related phenomenon. The burning of fossil fuels ( coal and oil ) by power-production companies and industries releases sulfur into the air that combines with oxygen to form sulfur dioxide ( SO2 ).
Exhausts from cars cause the formation of nitrogen oxides in the air. From these gases, airborne sulfuric acid ( H2SO4 ) and nitric acid ( HNO3 ) can be formed and be dissolved in the water vapor in the air.
Although acid-rain gases may originate in urban areas, they are often carried for hundreds of miles in the atmosphere by winds into rural areas. That is why forests and lakes in the countryside can be harmed by acid rain that originates in cities.
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4. Geographic distribution of Acid Rains
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5. Effects of Acid Rain
The environment can generally adapt to a certain amount of acid rain. Often soil is slightly basic. Because bases counteract acids, these soils tend to balance out some of the acid rain's acidity. But in areas, such as some of the Rocky Mountains and parts of the northwestern and southeastern United States, where limestone does not naturally occur in the soil, acid rain can harm the environment.
Some fish and animals, such as frogs, have a hard time adapting to and reproducing in an acidic environment. Many plants, such as evergreen trees, are damaged by acid rain and acid fog. We can seen some of the acid-rain damage to the evergreen forests in the Black Forest of Germany. Much of the Black Forest was indeed black because so much of the green pine needles had been destroyed, leaving only the black trunks and limbs!
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Black Forest in Germany
50 слайд
Forest
in Japan
51 слайд
6. How does acid precipitation
affect stone and buildings
Acid precipitation affects stone primarily in two ways: dissolution and alteration. When sulfuric, and nitric acids in polluted air react with the calcite in marble and limestone, the calcite dissolves. In exposed areas of buildings and statues, we see roughened surfaces, removal of material, and loss of carved details. Stone surface material may be lost all over or only in spots that are more reactive. Gypsum is white, but the crystals form networks that trap particles of dirt and pollutants, so the crust looks black. Eventually the black crusts blister and spall off, revealing crumbling stone.
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7. Conclusion
No,
we don't need to start
wearing a rainhat.
Now, acid rain is not pure acid falling from the sky, but rather it is rainfall or atmospheric moisture that has been mixed with elements and gases that have caused the moisture to become more acidic than normal.
Acid Rain:
Do we need to start wearing a rainhat ?
Hypothesis:
Conclusion:
![Let's have a Rest"Hug the Earth"](https://documents.infourok.ru/be201859-a302-45ef-8bbb-fdad387fca97/0/slide_53.jpg "Let's have a Rest"Hug the Earth"")
53 слайд
Let's have a Rest
"Hug the Earth"
!["The Tree of Good Deeds"+ should
(shouldn't)](https://documents.infourok.ru/be201859-a302-45ef-8bbb-fdad387fca97/0/slide_54.jpg ""The Tree of Good Deeds"+ should
(shouldn't)")
54 слайд
"The Tree of Good Deeds"
+ should
(shouldn't)
!["The Tree of Good Deeds"](https://documents.infourok.ru/be201859-a302-45ef-8bbb-fdad387fca97/0/slide_55.jpg ""The Tree of Good Deeds"")
55 слайд
"The Tree of Good Deeds"
56 слайд
The Code of Ecological rules
Plant trees
Ride a bike instead of car
Don’t waste too much energy, switch off the light if you don’t need it
Keep water
Don’t waste paper
Keep animals, flowers and feed animals
Don’t throw litter in the streets
Don’t burn fires
Take an active part in cleaning the streets and the rivers
57 слайд
What did I learn at this lesson?
What was new thing for me?
Reflection
I learned ...
58 слайд
ex-3, p-91
Home Task
59 слайд
If you don’t think about the future,
you will not have it.
(J.Galsworthy )
You
Me
and
60 слайд
Let's save our planet for our future generation!!!
61 слайд
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