Presentation on the biological cycle in nature. Presentation on the topic "The cycle of chemicals in nature"

"Gas laws" - Amedeo Avogadro suggested in 1811 that in the same volumes of different gases there is the same number of molecules. Gay-Lussac (1778-1850) At constant temperature and pressure, the volumes of reacting gases are related to each other, as well as to the volumes of gaseous products formed, as small integers.

"Toxic Substances" - Toxicity of a xenobiotic. The ability to complex. Tox+R? Tox-R. A poison is a substance that causes poisoning or death when it enters the body. c) Influence of the acid-base nature of xenobiotics and the pH of biological media on the interphase equilibria L1–L2. The mechanism is ligand-receptor. Acid-base properties.

"Structure of solids" - Cat's eye. Amethyst. Quartz (it. Quarz) - Free content in the earth's crust 12%. Elementary cell parameters. Structural crystallography. Photograph of electrical steel showing the structure of a polycrystal. Physical properties: 1) Correct shape. 2) Constant melting point 3) Isotropy.

"Great circulation of substances" - B. Clean air. Crossword. Circulation of matter. 2. R. 4. F. 1. 3. A. Products. E d o k i. M u s o r s ch i k i. Pure water. O. Topic: a large circulation of substances. C o r m i l ts y.

"Crystal lattice" - HCl, Cl2, H2O, NaBr, BaCl2, CaS, O2, NH3, CO2, C. Classification solids. the topic of the lesson is CRYSTAL LATTICES. Characteristics of the main types crystal lattices. Task: Determine the type chemical bond in these compounds:

“Simple substances - metals and non-metals” - The purpose of the lesson: Test yourself: What groups can all substances be divided into by composition? Issues for discussion: A sample of the assignment. What is the relationship between the composition, properties and use of substances? Show the winning path that the electronic circuits of non-metal atoms make up: Is there a difference in the structure of atoms of metals and non-metals?

Presentation for the lesson on the topic "Circulation of substances in the biosphere"

Prepared by a teacher of biology of the highest qualification category Musaeva N.L.

2017

The purpose of the lesson: give the concept of the circulation of substances, the relationship of substances in the biosphere, compliance with the unified laws of nature.

Lesson objectives:

• Expand knowledge about the cycle of substances.
• Show the movement of substances in the biosphere.
• Show the role of the circulation of substances in the biosphere.

Equipment:

tables "The boundaries of the biosphere and the density of life in it", the scheme of the circulation of substances, PC, projector, presentation.

Vernadsky

Vladimir Ivanovich.

Vernadsky VI carried out the most important research in the field of biology. Gave in 1926 the definition of the biosphere.

Vernadsky V. I. one of the founders of biogeochemistry.

Vernadsky Vladimir Ivanovich

12.03.1863 – 6.01.1945

Over billions of years, photosynthetic organisms (Fig. 1) have been tied up and turned into chemical work great amount solar energy. Part of its reserves during geological history accumulated in the form of deposits of coal and other fossil organic substances - oil, peat, etc.

Biosphere

The biosphere, according to V. I. Vernadsky, is a general planetary shell, that area of ​​the Earth where life exists or existed and which is or has been exposed to it.

Rice. 1. The first land plants (400 million years ago)

Mountain education

breeds

Thanks to living beings, many rocks on Earth arose.

Living organisms play a large role in the destruction and weathering of rocks on land. They are the main destroyers of dead organic matter.

Rice. 3. Ocean soils under the microscope

V.V. Dokuchaev.

Living organisms create cycles of the most important biogenic elements in the biosphere, which alternately pass from living matter to inorganic matter. These cycles are divided into two main groups: gas cycles and sedimentary cycles. In the first case, the main supplier of elements is the atmosphere (carbon, oxygen, nitrogen), in the second case, sedimentary rocks (phosphorus, sulfur, etc.).

V. V. Dokuchaev (1846 - 1903)

Circulation of matter.

In each ecosystem, the cycle of matter occurs as a result of the ecophysiological relationship of autotrophs and heterotrophs.

Participate in the cycle of substances

Consumers

decomposers

Producers

inorganic substances

The water cycle.

Water cycle - about 2 million years

Water evaporation

plants

The oxygen cycle.

The cycle of oxygen takes about 2000 years on Earth, water - about 2 million years

The carbon cycle.

The duration of the carbon cycle is three to four centuries.

Phosphorus cycle

Answer the questions

1. What organisms of the biosphere are involved in the cycle of matter?

2. What determines the amount of biomass in the biosphere?

3. What is the role of photosynthesis in the cycle of matter?

4. What is the role of the carbon cycle in the biosphere?

5. What organisms are involved in the nitrogen cycle?

Homework: learn paragraph 16.2. pp.491-495

Advanced study: pick up material about the main environmental problems of our time.

The cycle of substances in nature, a powerpoint presentation for a natural history lesson in grade 5, carries interesting information about how substances in nature rotate and return to it, passing through various organisms along the way. For fifth-graders, this is such a topic, interest in which has always been great, if only for the reason that they are very surprised that even themselves, as living organisms, participate in this cycle of substances. The powerpoint presentation can be used both in nature studies in grade 5 and in the lessons of the world around us in elementary school.
Here is this presentation on the topic of the cycle of substances in nature, also designed for free download and put up on our website. Therefore, there is practically no need to even think, but you need to download a free presentation on the topic of the cycle of substances in nature. Thus, it turns out that we also help teachers and students a little in the educational process.

Presentation cycling download

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Definition of the biosphere Biosphere, according to V.I. Vernadsky, is the general planetary shell, that area of ​​the Earth where life exists or existed and which is or has been exposed to it. The biosphere covers the entire surface of the land, seas and oceans, as well as that part of the bowels of the Earth where the rocks created by the activity of living organisms are located. Definition of the biosphere Biosphere, according to V.I. Vernadsky, is the general planetary shell, that area of ​​the Earth where life exists or existed and which is or has been exposed to it. The biosphere covers the entire surface of the land, seas and oceans, as well as that part of the bowels of the Earth where the rocks created by the activity of living organisms are located. V. I. Vernadsky () Academician, founder of the science of geochemistry

The Role of Living Organisms in the Biosphere Living organisms create cycles in the biosphere of the most important biogenic elements, which alternately pass from living matter to inorganic matter. These cycles are divided into two main groups: gas cycles and sedimentary cycles. In the first case, the main supplier of elements is the atmosphere (carbon, oxygen, nitrogen), in the second case, sedimentary rocks (phosphorus, sulfur, etc.). Thanks to living beings, many rocks on Earth arose. Organisms have the ability to selectively absorb and accumulate individual elements in themselves in much more than they are in environment. Performing a gigantic biological circulation of substances in the biosphere, life maintains stable conditions for its existence and the existence of a person in it. Living organisms play a large role in the destruction and weathering of rocks on land. They are the main destroyers of dead organic matter. The Role of Living Organisms in the Biosphere Living organisms create cycles in the biosphere of the most important biogenic elements, which alternately pass from living matter to inorganic matter. These cycles are divided into two main groups: gas cycles and sedimentary cycles. In the first case, the main supplier of elements is the atmosphere (carbon, oxygen, nitrogen), in the second case, sedimentary rocks (phosphorus, sulfur, etc.). Thanks to living beings, many rocks on Earth arose. Organisms have the ability to selectively absorb and accumulate individual elements in themselves in much greater quantities than they are in the environment. Performing a gigantic biological circulation of substances in the biosphere, life maintains stable conditions for its existence and the existence of a person in it. Living organisms play a large role in the destruction and weathering of rocks on land. They are the main destroyers of dead organic matter. V. V. Dokuchaev () The founder of modern soil science,

The concept of "living matter" The biosphere covers the entire surface of the land, seas and oceans, as well as that part of the bowels of the Earth, where there are rocks created by the activity of living organisms. In the atmosphere, the upper limits of life are determined by the ozone screen - a thin layer of ozone gas at a height of 16–20 km. It blocks the harmful ultraviolet rays of the sun. The ocean is saturated with life entirely, to the bottom of the most deep depressions at 10–11 km. In the depths of the solid part of the Earth, active life penetrates in places up to 3 km (bacteria in oil fields). The results of the vital activity of organisms in the form of sedimentary rocks can be traced even deeper. Reproduction, growth, metabolism and activity of living organisms over billions of years have completely transformed this part of our planet. The whole mass of organisms of all types V.I. Vernadsky called the living matter of the Earth. The concept of "living matter" The biosphere covers the entire surface of the land, seas and oceans, as well as that part of the bowels of the Earth, where there are rocks created by the activity of living organisms. In the atmosphere, the upper limits of life are determined by the ozone screen - a thin layer of ozone gas at a height of 16–20 km. It blocks the harmful ultraviolet rays of the sun. The ocean is saturated with life entirely, to the bottom of the deepest depressions 10-11 km. In the depths of the solid part of the Earth, active life penetrates in places up to 3 km (bacteria in oil fields). The results of the vital activity of organisms in the form of sedimentary rocks can be traced even deeper. Reproduction, growth, metabolism and activity of living organisms over billions of years have completely transformed this part of our planet. The whole mass of organisms of all types V.I. Vernadsky called the living matter of the Earth.

The Great Cycle The Great Cycle, lasting for millions of years, consists in the fact that the rocks are destroyed, and the weathering products are carried by water flows to the World Ocean, where they form marine strata and only partially return to land with precipitation. The great cycle, which continues for millions of years, consists in the fact that rocks are destroyed, and weathering products are carried by water flows to the World Ocean, where they form marine strata and only partially return to land with precipitation.

Small cycle The small cycle (part of the big one) takes place at the ecosystem level and consists nutrients, water and carbon are accumulated in the matter of plants, spent on building the body and on life processes, both of these plants themselves and of other organisms (usually animals) that eat these plants (consumers). A small cycle (part of a large one) occurs at the ecosystem level and consists in the fact that nutrients, water and carbon accumulate in the substance of plants, are spent on building the body and on life processes, both of these plants themselves and of other organisms (usually animals ) that eat these plants (consumers).

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The cycle of substances Carbon in nature The carbon cycle in nature Processes in the carbon cycle Nitrogen in nature The nitrogen cycle The cycle of substances Oxygen in nature The oxygen cycle Video clip about the oxygen cycle

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Circulation of Substances

Illuminating the issue of circulation chemical elements It is important to note that various chemical reactions constantly occur in nature. Some of these reactions take place without the participation of living beings, and some - with their direct participation, that is, in wildlife. As a result chemical processes atoms move, move. As a result, there is an exchange of matter and energy between all the shells of the Earth: the lithosphere, atmosphere, hydrosphere, biosphere. The cycle of chemical elements is the reason for the constancy of the flow chemical reactions. We can say that thanks to the cycle of chemical elements, life on Earth is possible. The cycle of substances is a repetitive process of transformation and movement of substances in nature, which is more or less cyclical. Cycles of carbon and oxygen play a particularly important role for life on Earth. Contents Next.

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carbon in nature

All earthly life based on carbon. Each molecule of a living organism is built on the basis of a carbon skeleton. Carbon atoms are constantly migrating from one part of the biosphere to another. Using the example of the carbon cycle in nature, one can trace the dynamics of life on our planet in dynamics. The main reserves of carbon on Earth are in the form of carbon dioxide contained in the atmosphere and dissolved in the oceans, that is, carbon dioxide (CO2). family of carbon materials Carbon nanotubes Contents Next.

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The carbon cycle

When organisms breathe, CO2 is released back into the atmosphere. A certain part of the carbon accumulates in the form of dead organic matter and becomes fossilized. When death occurs, saprophages and bioreducers of two types decompose and mineralize corpses, forming food chains, at the end of which carbon often enters the cycle in the form of carbon dioxide.

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Carbon cycle processes