Which of the following is the best definition of structural methods in a text?

the organisation and arrangement of ideas or events

the choice of vocabulary to convey tone and mood

the use of dialogue to develop characters

the use of literary devices to create dramatic imagery

Structural methods in a dramatic account

Covalent Molecules and Compounds Just as an atom is the simplest unit that has the fundamental chemical properties of an element, a molecule is the simplest unit that has the fundamental chemical properties of a covalent compound. Some pure elements exist as covalent molecules. Hydrogen, nitrogen, oxygen, and the halogens occur naturally as the diatomic (“two atoms”) molecules H2, N2, O2, F2, Cl2, Br2, and I2 (part (a) in Figure 3.1.1). Similarly, a few pure elements exist as polyatomic (“many atoms”) molecules, such as elemental phosphorus and sulfur, which occur as P4 and S8 (part (b) in Figure 3.1.1). Each covalent compound is represented by a molecular formula, which gives the atomic symbol for each component element, in a prescribed order, accompanied by a subscript indicating the number of atoms of that element in the molecule. The subscript is written only if the number of atoms is greater than 1. For example, water, with two hydrogen atoms and one oxygen atom per molecule, is written as H2O. Similarly, carbon dioxide, which contains one carbon atom and two oxygen atoms in each molecule, is written as CO2. Covalent compounds that predominantly contain carbon and hydrogen are called organic compounds. The convention for representing the formulas of organic compounds is to write carbon first, followed by hydrogen and then any other elements in alphabetical order (e.g., CH4O is methyl alcohol, a fuel). Compounds that consist primarily of elements other than carbon and hydrogen are called inorganic compounds; they include both covalent and ionic compounds. In inorganic compounds, the component elements are listed beginning with the one farthest to the left in the periodic table, as in CO2 or SF6. Those in the same group are listed beginning with the lower element and working up, as in ClF. By convention, however, when an inorganic compound contains both hydrogen and an element from groups 13–15, hydrogen is usually listed last in the formula. Examples are ammonia (NH3) and silane (SiH4). Compounds such as water, whose compositions were established long before this convention was adopted, are always written with hydrogen first: Water is always written as H2O, not OH2. The conventions for inorganic acids, such as hydrochloric acid (HCl) and sulfuric acid (H2SO4), are described elswhere. Note! For organic compounds: write C first, then H, and then the other elements in alphabetical order. For molecular inorganic compounds: start with the element at far left in the periodic table; list elements in same group beginning with the lower element and working up. Write the molecular formula of each compound. a. The phosphorus-sulfur compound that is responsible for the ignition of so-called strike anywhere matches has 4 phosphorus atoms and 3 sulfur atoms per molecule. b. Ethyl alcohol, the alcohol of alcoholic beverages, has 1 oxygen atom, 2 carbon atoms, and 6 hydrogen atoms per molecule. c. Freon-11, once widely used in automobile air conditioners and implicated in damage to the ozone layer, has 1 carbon atom, 3 chlorine atoms, and 1 fluorine atom per molecule. Solution: a. • A The molecule has 4 phosphorus atoms and 3 sulfur atoms. Because the compound does not contain mostly carbon and hydrogen, it is inorganic. • B Phosphorus is in group 15, and sulfur is in group 16. Because phosphorus is to the left of sulfur, it is written first. • C Writing the number of each kind of atom as a right-hand subscript gives P4S3 as the molecular formula. b. • A Ethyl alcohol contains predominantly carbon and hydrogen, so it is an organic compound. • B The formula for an organic compound is written with the number of carbon atoms first, the number of hydrogen atoms next, and the other atoms in alphabetical order: CHO. • C Adding subscripts gives the molecular formula C2H6O. c. • A Freon-11 contains carbon, chlorine, and fluorine. It can be viewed as either an inorganic compound or an organic compound (in which fluorine has replaced hydrogen). The formula for Freon-11 can therefore be written using either of the two conventions. • B According to the convention for inorganic compounds, carbon is written first because it is farther left in the periodic table. Fluorine and chlorine are in the same group, so they are listed beginning with the lower element and working up: CClF. Adding subscripts gives the molecular formula CCl3F. • C We obtain the same formula for Freon-11 using the convention for organic compounds. The number of carbon atoms is written first, followed by the number of hydrogen atoms (zero) and then the other elements in alphabetical order, also giving CCl3F. Write the molecular formula for each compound. a. Nitrous oxide, also called “laughing gas,” has 2 nitrogen atoms and 1 oxygen atom per molecule. Nitrous oxide is used as a mild anesthetic for minor surgery and as the propellant in cans of whipped cream. b. Sucrose, also known as cane sugar, has 12 carbon atoms, 11 oxygen atoms, and 22 hydrogen atoms. c. Sulfur hexafluoride, a gas used to pressurize “unpressurized” tennis balls and as a coolant in nuclear reactors, has 6 fluorine atoms and 1 sulfur atom per molecule. Answer: a. N2O b. C12H22O11 c. SF6. Ionic Compounds The substances described in the preceding discussion are composed of molecules that are electrically neutral; that is, the number of positively-charged protons in the nucleus is equal to the number of negatively-charged electrons. In contrast, ions are atoms or assemblies of atoms that have a net electrical charge. Ions that contain fewer electrons than protons have a net positive charge and are called cations. Conversely, ions that contain more electrons than protons have a net negative charge and are called anions. Ionic compounds contain both cations and anions in a ratio that results in no net electrical charge. Note! Ionic compounds contain both cations and anions in a ratio that results in zero electrical charge.An ionic compound that contains only two elements, one present as a cation and one as an anion, is called a binary ionic compound. One example is MgCl2, a coagulant used in the preparation of tofu from soybeans. For binary ionic compounds, the subscripts in the empirical formula can also be obtained by crossing charges: use the absolute value of the charge on one ion as the subscript for the other ion. This method is shown schematically as follows: Crossing charges. One method for obtaining subscripts in the empirical formula is by crossing charges. When crossing charges, it is sometimes necessary to reduce the subscripts to their simplest ratio to write the empirical formula. Consider, for example, the compound formed by Mg2+ and O2−. Using the absolute values of the charges on the ions as subscripts gives the formula Mg2O2:Polyatomic Ions Polyatomic ions are groups of atoms that bear net electrical charges, although the atoms in a polyatomic ion are held together by the same covalent bonds that hold atoms together in molecules. Just as there are many more kinds of molecules than simple elements, there are many more kinds of polyatomic ions than monatomic ions. Two examples of polyatomic cations are the ammonium (NH4+) and the methylammonium (CH3NH3+) ions. P. The method used to predict the empirical formulas for ionic compounds that contain monatomic ions can also be used for compounds that contain polyatomic ions. The overall charge on the cations must balance the overall charge on the anions in the formula unit. Thus, K+ and NO3− ions combine in a 1:1 ratio to form KNO3 (potassium nitrate or saltpeter), a major ingredient in black gunpowder. Similarly, Ca2+ and SO42− form CaSO4 (calcium sulfate), which combines with varying amounts of water to form gypsum and plaster of Paris. The polyatomic ions NH4+ and NO3− form NH4NO3 (ammonium nitrate), a widely used fertilizer and, in the wrong hands, an explosive. One example of a compound in which the ions have charges of different magnitudes is calcium phosphate, which is composed of Ca2+ and PO43− ions; it is a major component of bones. The compound is electrically neutral because the ions combine in a ratio of three Ca2+ ions [3(+2) = +6] for every two ions [2(−3) = −6], giving an empirical formula of Ca3(PO4)2; the parentheses around PO4 in the empirical formula indicate that it is a polyatomic ion. Writing the formula for calcium phosphate as Ca3P2O8 gives the correct number of each atom in the formula unit, but it obscures the fact that the compound contains readily identifiable PO43− ions.Summary • There are two fundamentally different kinds of chemical bonds (covalent and ionic) that cause substances to have very different properties. • The composition of a compound is represented by an empirical or molecular formula, each consisting of at least one formula unit.Contributors The atoms in chemical compounds are held together by attractive electrostatic interactions known as chemical bonds. Ionic compounds contain positively and negatively charged ions in a ratio that results in an overall charge of zero. The ions are held together in a regular spatial arrangement by electrostatic forces. Most covalent compounds consist of molecules, groups of atoms in which one or more pairs of electrons are shared by at least two atoms to form a covalent bond. The atoms in molecules are held together by the electrostatic attraction between the positively charged nuclei of the bonded atoms and the negatively charged electrons shared by the nuclei. The molecular formula of a covalent compound gives the types and numbers of atoms present. Compounds that contain predominantly carbon and hydrogen are called organic compounds, whereas compounds that consist primarily of elements other than carbon and hydrogen are inorganic compounds. Diatomic molecules contain two atoms, and polyatomic molecules contain more than two. A structural formula indicates the composition and approximate structure and shape of a molecule. Single bonds, double bonds, and triple bonds are covalent bonds in which one, two, and three pairs of electrons, respectively, are shared between two bonded atoms. Atoms or groups of atoms that possess a net electrical charge are called ions; they can have either a positive charge (cations) or a negative charge (anions). Ions can consist of one atom (monatomic ions) or several (polyatomic ions). The charges on monatomic ions of most main group elements can be predicted from the location of the element in the periodic table. Ionic compounds usually form hard crystalline solids with high melting points. Covalent molecular compounds, in contrast, consist of discrete molecules held together by weak intermolecular forces and can be gases, liquids, or solids at room temperature and pressure. An empirical formula gives the relative numbers of atoms of the elements in a compound, reduced to the lowest whole numbers. The formula unit is the absolute grouping represented by the empirical formula of a compound, either ionic or covalent. Empirical formulas are particularly useful for describing the composition of ionic compounds, which do not contain readily identifiable molecules. Some ionic compounds occur as hydrates, which contain specific ratios of loosely bound water molecules called waters of hydration.

Teaching English Introduction to the course: Language learning and teaching A 2 Characteristics of the language learners: Studying a system that aligns with international standards. A3 Cognitive factors in language learning: Addressing questions and obtaining necessary information regarding phenomena such as transfer, interference, and generalization; A4 Inductive and deductive language learning: ability and intelligence; and the phenomenon of systematic forgetting A5 Language learning methods and strategies: Familiarizing with foreign language learning methods, strategies for learning foreign languages, and communication strategies A6 International Assessment System of language skills in CEFR, IELTS, TOEFL: effective methods and strategies used to improve language skills (listening, reading, writing, speaking) A7 Psychological factors in language learning: Exploring various psychological factors such as self-esteem, shyness, risk-taking, anxiety, attitude, and motivation A8 The effectiveness of authentic materials during the learning process: The role of tasks and games in teaching foreign languages A9 Errors in language learning: Discussing types of errors, identifying and describing errors, causes of errors, and fossilized errors A10 Error correction or error analysis approaches: developing students' ability to apply their knowledge in practicing error correction A11 Age-related factors in language learning: Exploring types of comparisonand contrast, focusing on topics such as the age hypothesis and bilingualism, and providing a detailed explanation of these concepts A12 Teaching grammar: Studying grammar teaching methods; deductive and inductive approaches in grammar teaching; A13 Teaching grammar through context: linguistic intuition; language phenomena; using grammatical dictionaries; analyzing grammatical tasks; and designing exercises, tasks, and tests through completing grammarbased activities. A14 Teaching vocabulary. Seeking answers to questions such as 'What is a word?' and 'What does it mean to learn a word?' A15 Teaching vocabulary in context: teaching lexical units/phrases/collocations; introducing new vocabulary; using corpus data for pedagogical purposes; developing students' vocabulary learning strategies A16 Assessing vocabulary tasks: designing vocabulary tasks, exercises, and tests. In international assessment systems such as CEFR, IELTS, and TOEFL, grammar accuracy and lexical resource A 17 Teaching pronunciation: Understanding the importance of pronunciation for successful communication; teaching stress; teaching intonation A18 Modern technologies in teaching pronunciation A19 Error correction methods: watching to various experiences in this area and analyzing video lessons from international experts in the field A20 Analysis of skill integration in language learning: Understanding the stages of developing skill integration; integration of the four language skills; task-based integration; and project-based integration. A21 Teaching listening comprehension A22 Modern technologies in teaching listening comprehension A23 Teaching Speaking A24 Modern technologies in teaching Speaking A25 Teaching Reading A26 Modern technologies in teaching Reading A27 Teaching Writing A28 Modern technologies in teaching Writing A29 The role and importance of translation in teaching a foreign language A30 Module 2. International standards for teaching and assessment Classroom Language: The teacher's actions; the teacher's voice; the teacher's intonation; using the foreign language in the classroom A31 Foreign language environment: asking questions in the foreign language, giving instructions in the foreign language, providing oral explanations in the foreign language, and issues related to the use of the native language in the foreign language class. A 32 Designing curriculum: Studying, analyzing, and working with curricula designed for schools, lyceums, and colleges. A33 Planning lessons and the structure of lesson plans: determining thesequence of lessons, objectives, tasks, and expected outcomes; choosing the lesson structure for planning A34 Designing tasks for different stages of the lesson: Starting the lesson; concluding the lesson; connecting tasks within the lesson A35 Time management: allocating appropriate time for tasks during the lesson; and providing homework assignments A36 Educational materials and resources: Effective use of existing educational materials and resources; anticipating and addressing potential issues Planning and adapting materials: to the situation during teaching and working on lesson planning for groups of students with different abilities. A37 Classroom research: Stages of classroom research, data collection, analysis, and planning; creating/preparing the materials needed for data collection; distinguishing between the positive and negative aspects of the research A38 Data analysis: creating/preparing the materials needed for data collection; distinguishing between the positive and negative aspects of the research. A39 Peer lesson observation: Observing lessons; conducting interviews; questionnaires for teachers and students; maintaining a daily record; discussing problematic situations/events; notes and other aspects; the process of lesson observation: stages of observation; presenting observation results both orally and in writing. A40 Educational materials and national values: important tool for implementing and promoting educational standards, as well as national values. A41 Differences between methods of teaching foreign languages: practical application of modern methods in language teaching; foreign experiences in language teaching: the grammar-translation method; the method of conducting lessons entirely in the foreign language; the audio-linguistic method; and communicative methods. A42 Methods used in the local environment and their analysis: Discussion of the positive and negative aspects of various methods; language and culture; teaching/learning processes; the role of the native language in learning a foreign language; and the psychological foundations of foreign language teaching. A43 Teaching a foreign language through computer technologies A44 Types of independent work and its implementation A45 Principles of Assessment in foreign language teaching А46 Issues in Language Assessment А47 Alternatives in Assessment А48 Test methods. Methods and criteria for assessing language aspects: written expression, reading, listening comprehension, speaking, А49 integrating language skills: vocabulary; grammar; alternative forms of assessment; planning assessment; critical analysis; principles for designingtest tasks: scientific rigor, consistency, conciseness, clarity, informality, logical sequence, and systematic approach. А50 Foreign language for ESP. Studying and analyzing needs; setting objectives for teaching a foreign language in a specific field or professional area; defining teaching approaches in curriculum development; and discussing topics related to these areas. А51 Selecting textbooks, materials and resources А52 Content-based Instruction (CBI) А53 Strategies-based Instruction А54 Lifelong Learning: Teacher development, PreSETT, InSETT А55 The Role of Teaching Practice A56 Organization and implementation of compulsory and non-compulsory course process in foreign language teaching A57 Organization in and outclass activities A58 Defining the goals and content of foreign language teaching at various levels of the education system in the Republic of Uzbekistan: evaluating educational materials; adapting educational materials; creating educational materials; and discussing the role of the foreign language teacher in specialized fields to gain relevant information. A59 The role of independent study skills: foreign language focused on reading, research and study skills; make revision questions. incclude mcq question. answer the question. true false

Studying population involves examining various aspects of the demographic composition, dynamics, and characteristics of a group of individuals within a specific geographic area. Here are key areas to explore when studying population: Demography: Population Size: Analyze the total number of individuals in a given area or community. Population Distribution: Examine how the population is spread across different regions or areas. Population Density: Explore the concentration of people in a particular area relative to the size of that area. Population Growth and Decline: Birth Rate: Study the number of live births per 1,000 people in a given year. Death Rate: Examine the number of deaths per 1,000 people in a given year. Migration: Explore patterns of people moving into and out of a specific area. Age Structure: Age Distribution: Analyze the distribution of individuals across different age groups in a population. Dependency Ratio: Examine the ratio of dependent individuals (young and elderly) to the working-age population. Gender Composition: Sex Ratio: Study the ratio of males to females in a population. Population Pyramids: Use population pyramids to visualize the age and gender structure of a population. Fertility and Family Planning: Total Fertility Rate (TFR): Explore the average number of children a woman is expected to have during her reproductive years. Contraceptive Use: Analyze the prevalence of contraceptive methods in a population. Mortality and Health: Life Expectancy: Examine the average number of years a person can expect to live. Infant and Child Mortality: Study the number of deaths among infants and children under the age of five. Urbanization: Urban vs. Rural Population: Analyze the distribution of people in urban and rural areas. Rate of Urbanization: Explore the speed at which people are moving from rural to urban areas. Education: Literacy Rates: Examine the percentage of the population that can read and write. Educational Attainment: Study the level of education achieved by individuals within the population. Socioeconomic Factors: Income Distribution: Explore the distribution of income among the population. Employment Rates: Analyze the percentage of the working-age population that is employed. Cultural and Ethnic Composition: Ethnic Diversity: Examine the presence of various ethnic groups within the population. Healthcare and Quality of Life: Access to Healthcare: Study the availability and accessibility of healthcare services. Quality of Life Indicators: Explore factors such as housing, sanitation, and overall living conditions. Population Policies and Government Interventions: Study the impact of government policies on population dynamics, including family planning programs and immigration policies. Environmental Impact: Explore the relationship between population growth and its impact on the environment, including resource consumption and pollution. Global Population Trends: Examine global population trends and their implications, including aging populations and population growth in developing countries. Studying population involves a multidisciplinary approach that incorporates elements from demography, sociology, geography, economics, and public health. Researchers and policymakers use this information to make informed decisions about resource allocation, development planning, and social policies.

4. Food Storage Methods Food storage means keeping food safely for future use. 🌍 A. Indigenous (Traditional) Storage Methods 4 These are methods used long ago and still used in rural areas: Drying (Sun drying) – removing water from food (e.g. vegetables, meat) Smoking – preserving meat or fish using smoke Salting – adding salt to prevent spoilage Fermentation – changing food using microorganisms (e.g. sour milk) Use of granaries – storing grains in raised structures Clay pots – keeping food cool and fresh 🧊 B. Modern Storage Methods 6 These use technology to keep food fresh: Refrigeration – keeping food cold in a fridge Freezing – storing food at very low temperatures Canning – sealing food in tins Bottling – storing liquids in sealed bottles Vacuum sealing – removing air from packaging Use of preservatives – adding chemicals to prevent spoilage ⭐ 5. Importance of Food Storage Prevents food from going bad Reduces food wastage Saves money Ensures food is available in times of shortage Maintains food quality and safety

• Landscape management A landscape is the evident factor of a land, its landforms, and the combined features of natural or artificial elements. Landscape management includes maintenance and integration of physical elements, water bodies, land cover, indigenous vegetation, human elements, such as structures and buildings, and climatic conditions. • Soil Preparation In the list of farming practices, soil preparation is placed second because of its importance for seed germination. Before a crop is grown, the soil is leveled and plowed a bit deeply to prepare it for the sowing of seed. After plowing, the soil loosens and develops proper aeration in the soil. • Sowing Seed selection from good quality varieties is the principal step of sowing. After preparing the soil, seeds are spread over the field, called sowing. Manual and mechanical (seeders) methods of sowing can be used. Some plants, such as rice, are first grown as seedlings in a small space and later transplanted to fields. • Manuring Plants need nutrients for their growth and fruit/seed production. Therefore, nutrients must be consumed at even intervals. Fertilization is the stage at which nutrients are introduced into the lands. These nutrients can be natural manure or artificial fertilizers. Decomposed products and waste of plants and animals are used as manure because of their nutrient richness. • Irrigation Irrigation means supplying water to plants. Water sources can be dams, ponds, wells, canals, etc. Excessive irrigation can damage crops and lead to waterlogging. The irrigation interval and frequency must be monitored, as they vary with the crop. • Weeding Unwanted plants grown alongside field crops are known as weeds. These plants are removed with the help of weed killers (weedicides), manually plucking with hands. Several weeds can be removed with better soil preparation techniques. • Integrated Pest Management • IPM – Integrated Pest Management, is a successful and ecologically sensitive technique to manage pests using combined sustainable practices. IPM is a series of methods including pest assessment, decision, and control techniques • Integrating Crops and Livestock Integrating crops and livestock increases the diversity and environmental sustainability of both sectors. In the meantime, it will offer opportunities to increase overall agricultural production and profitability. • Storage/Selling In the end steps of agricultural practices, the resulting grains are stored in warehouses for later use and selling purposes. Therefore, better plant protection methods must be used to protect grains from rodents and insect pests. The stores should be cleaned, dried, well-fumigated, etc., before storing grains. • Harvesting Among steps of farming practices, harvesting needs significant care otherwise it will result in yield reduction. When the crop reaches maturity, the cutting starts, and the produce will be stored in a dry place. This process is known as harvesting. After harvesting, manual or mechanical thrashing is done to separate grains from the plants.

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