agriculture contribution, modern farm equipment requirements, new farm machinery and equipment deliveries, land reclamation work, fertilizers producing plant construction, world water resource distribution, ecosystem equilibrium state, soil nitrogen content analysis, farm machinery maintenance problems, per capita water consumption.

8. Translate the following word combinations in written form.

non-living environment, major components, organic compounds, primary consumers, food chain, material cycles, equilibrium of ecosystem, layer of ozone, simple inorganic substance, extinction of wildlife, globe's material resource, unreasonable utilization, complex living organisms

9.Translate these sentences in written form.

1. The living organisms and their non-living environment interact with each other. 2. There are six major components in an ecosystem. 3. Only green plants are able to manufacture food from simple inorganic substance. Primary consumers obtain their energy from green plants. Secondary consumers such as dogs and cats feed on other animals. 4. Bacteria break down the flesh of dead animals. 5. Decomposers enable chemical substances to return to the physical environment. 6. The Sun's energy travels through an ecosystem. The proper transfer of energy through an ecosystem by the producers, the consumers and the decomposers is called a food chain. 7. Material cycles include cycles of nitrogen, carbon, oxygen, water and mineral salts. If fire destroyed the vegetation in a region, there would be certain changes. 8. During long periods of time ecosystems evolve. Extinction of wildlife might destroy the equilibrium of ecosystem.

10. Express the main idea of the text in the shortest possible way.

11. Test your vocabulary.

1.Organisms (specifically, animals) that are not able to produce their own food and must eat other organisms.

A Сonsumers

B Decomposers C Producers

D Heterotrophs

2.The process by which materials are broken down into simpler compounds by decomposers.

A Evolution

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BCultivation

CDecomposition

DDistribution

3.Organisms such as bacteria and fungi that decompose dead plants and animals.

A Producers B Сonsumers

C Heterotrophs D Decomposers

4.A process in which a population of self-replicating entities undergoes variation, with successful variants spreading and becoming the basis for further variation.

A Cultivation B Evolution

C Distribution D Decomposition

5.An organism that converts solar energy into biomass.

AРroducer

BСonsumers

CHeterotrophs

DDecomposers

6.The proper transfer of energy through an ecosystem by the producers, the consumers and the decomposers is called ..... .

A producer

B materials cycles C development D a food chain

7.An ecological community of various plants, animals, and other organisms, interacting with each other and with the nonliving resources in their environment, all functioning as a unit.

A Ecoregion B Ecosystem

C Equilibrium state D Biocenosis

8.Complete disappearance of a species from the earth.

AExtinction

BExpanding

CConsumption

DReplicating

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