BSEH SS Home Science cheat sheet

Growth = measurable increase in body size (height, weight, head circumference); development = progressive change in functional capacity (motor, cognitive, social, emotional).

Cephalocaudal principle: control develops head-to-toe (head lifting before sitting, sitting before walking); proximodistal principle: trunk before extremities, arm before fingers.

Average birth weight ~2.5–3.5 kg; weight doubles by ~5 months, triples by 1 year, quadruples by 2 years; birth length ~50 cm, increases ~50% in year one.

Height velocity peaks in infancy (~25 cm/year) and again at the pubertal spurt; girls' spurt begins ~2 years earlier than boys' (girls ~10–11, boys ~12–13 years).

Puberty staging uses Tanner's sexual maturity ratings (SMR 1–5) for breast/genital and pubic hair development; menarche typically follows the peak height spurt.

Piaget's stages: sensorimotor (0–2), preoperational (2–7), concrete operational (7–11), formal operational (11+); abstract hypothetical reasoning appears in formal operations.

Erikson's psychosocial stages: trust vs mistrust (infancy), autonomy vs shame (1–3), initiative vs guilt (3–6), industry vs inferiority (6–12), identity vs role confusion (adolescence).

Kohlberg's moral levels: preconventional (obedience/punishment, self-interest), conventional (social approval, law and order), postconventional (social contract, universal principles).

Adolescent identity formation (Marcia): identity statuses of diffusion, foreclosure, moratorium, and achievement, based on exploration and commitment.

Resources are classified as human (time, energy, knowledge, skills, attitudes) and non-human/material (money, land, equipment, goods); management is the efficient use of these to reach goals.

Management process: planning → organizing → implementing/controlling → evaluating; feedback loops back to planning.

Decision-making steps: identify problem → gather information → list alternatives → weigh consequences → choose → act → evaluate outcome.

Time management tools: priority matrices (urgent vs important), peak-load planning, time logs, and standard-time estimates for repeated tasks.

Money management: budget = planned spending of estimated income; balance sheet compares assets vs liabilities; net worth = assets − liabilities.

Family life cycle stages (Duvall): beginning family, childbearing, preschool, school-age, teenage, launching, middle-aged, aging - each stage shifts resource demands.

Resource substitution: when one resource is scarce (e.g., time), another (money or energy) is used to compensate; values and goals direct which substitution is chosen.

Community resources include schools, health centres, cooperatives, banks, self-help groups, and extension services; mapping them identifies gaps and access barriers.

Macronutrients: carbohydrates 4 kcal/g, protein 4 kcal/g, fat 9 kcal/g; alcohol ~7 kcal/g is not a nutrient requirement.

Balanced diet concept: energy from carbohydrate 50–60%, fat 20–30%, protein 10–15%; visible fat intake kept low, fibre 25–40 g/day for adults.

Protein quality: complete proteins supply all essential amino acids; limiting amino acid determines biological value; cereal + pulse combinations (mutual supplementation) improve protein quality.

Micronutrient deficiency disorders: vitamin A → night blindness/xerophthalmia; iron → anaemia; iodine → goitre/cretinism; vitamin D → rickets/osteomalacia; vitamin C → scurvy; thiamine → beriberi; niacin → pellagra.

Fat-soluble vitamins A, D, E, K are stored in the liver/adipose and can be toxic in excess; water-soluble B-complex and C are excreted and need regular intake.

Food spoilage agents: microorganisms (bacteria, moulds, yeasts), enzymes, oxidation, and physical damage; preservation methods target these agents (heat, cold, drying, acid, salt/sugar, irradiation).

Food safety: danger zone 5–60 °C; reheating must reach 74 °C; cross-contamination prevented by separating raw and cooked foods and washing hands/produce.

Nutritional assessment uses anthropometry (weight-for-age, height-for-age, BMI, MUAC), biochemical tests, clinical signs, and dietary surveys (24-hour recall, food frequency).

Health is a state of complete physical, mental and social well-being (WHO), not merely absence of disease; balanced diet, hygiene, sanitation and immunization sustain it.

Fibres are classified as natural (plant: cotton, jute, linen; animal: wool, silk) and man-made (regenerated: rayon; synthetic: polyester, nylon, acrylic).

Cotton: cellulose, absorbent, strong when wet, burns with paper-like odour and grey ash; polyester: thermoplastic, low absorbency, melts and beads on burning.

Yarn properties: staple fibres are spun (short), filament fibres are continuous; twist direction (S or Z) affects yarn strength and fabric hand.

Weaves: plain (strongest, e.g., muslin), twill (diagonal, e.g., denim), satin (lustrous, floats), plus knits (interlocking loops, stretchable).

Fabric finishes: mercerization (cotton lustre/strength), calendering (smoothness), sanforization (shrinkage control), water repellency, flame retardancy.

Dyeing methods: direct, vat, reactive, disperse (for synthetics); mordants fix natural dyes; fastness tested for washing, light and rubbing.

Pattern making: drafting from body measurements, flat pattern, and draping; seam allowances are added to the pattern, not to the body measurement.

Fashion cycle stages: introduction → rise → peak → decline → obsolescence; fashion adoption theories include trickle-down, bubble-up and trickle-across.

Family functions: reproduction, socialization, economic provision, emotional support, protection; family types: nuclear, joint, extended, single-parent, blended.

Parenting styles (Baumrind): authoritative (high warmth + high control), authoritarian (low warmth + high control), permissive (high warmth + low control), neglectful (low both).

Attachment theory (Bowlby/Ainsworth): secure, avoidant, ambivalent and disorganized patterns; secure attachment predicts later social competence.

Developmental domains: physical, cognitive, language, social, emotional, moral - assessed together, not in isolation.

Play stages: solitary, parallel, associative, cooperative; play supports motor, language, social and cognitive development.

Family stress model: stressors (illness, unemployment, death) interact with family resources and perception of the event to determine crisis or coping outcome.

Gender socialization occurs through family roles, media, school and peer groups; gender roles are learned, not biologically fixed.

Child-rearing practices vary by culture; discipline alternatives to corporal punishment include positive reinforcement, logical consequences and modelling.

Housing functions: shelter/protection, privacy, family interaction, work and study space, health and safety; housing adequacy assessed by space, ventilation, light, sanitation and safety.

Orientation and site: living rooms and bedrooms on east/south for morning sun; kitchens away from sleeping areas; prevailing wind used for cross-ventilation.

Ventilation: cross-ventilation needs openings on opposite walls; recommended air changes per hour vary by room; exhaust/window ventilation removes cooking fumes and moisture.

Lighting: daylight factor = indoor illuminance ÷ outdoor illuminance × 100; task lighting (kitchen counter, study desk) needs higher lux than general lighting.

Space standards: minimum floor area per person, room sizes related to furniture and circulation; anthropometrics (body dimensions) determine furniture and clearance dimensions.

Kitchen work triangle: sink, cooking range and refrigerator; work centres (preparation, cooking, washing, storage) linked by efficient traffic flow; work triangle perimeter kept short.

Principles of design: balance (symmetrical/asymmetrical), rhythm (repetition, gradation, radiation), emphasis, proportion, scale, harmony and unity.

Colour theory: hue, value, tint, shade, intensity; colour schemes - monochromatic, analogous, complementary, triadic; warm colours advance, cool colours recede.

Furniture arrangement: avoid blocking circulation paths, place heavy pieces against walls, group seating at 1.5–2.5 m for conversation, allow door swing clearances.

Consumer rights (UN guidelines): safety, information, choice, redress, representation, satisfaction of basic needs, education, healthy environment.

Consumer responsibilities: be informed, read labels, keep receipts/warranties, complain on time, avoid waste, use products safely.

Consumer Protection Act, 2019 (India): three-tier redressal - District Commission (up to ₹50 lakh), State Commission (₹50 lakh–₹2 crore), National Commission (above ₹2 crore).

Product liability and unfair trade practices (misleading ads, false claims, deficient service) are actionable under the 2019 Act; e-commerce transactions are covered.

Standardization marks: ISI (BIS) for industrial goods, AGMARK for agricultural produce, FSSAI for food, Hallmark for gold, Eco-mark for environment-friendly products.

Label information: name of food, ingredients list, net quantity, nutrition information, date of manufacture/best before, FSSAI licence number, storage instructions.

Advertising techniques to recognize: bandwagon, testimonial, snob appeal, fear appeal, bait-and-switch, hidden charges, fake discounts.

Consumer redressal steps: complain to seller → consumer association → consumer commission; keep bills, warranty cards, and written correspondence as evidence.

Right to education and awareness is delivered through consumer clubs, mass media, and extension programmes; voluntary consumer organizations supplement government action.

Communication model: sender → message → channel → receiver → feedback; noise is any interference that distorts the message.

Types of communication: verbal (oral, written) and non-verbal (gestures, posture, facial expression, proxemics); listening is the most used communication skill.

Extension teaching methods: individual (farm/home visits, phone), group (demonstrations, method demonstrations, group meetings), and mass (radio, TV, print, social media).

Method demonstration shows how to do a skill; result demonstration shows outcome and is more persuasive but takes longer.

Adoption process (Rogers): awareness → interest → evaluation → trial → adoption; innovators and early adopters lead diffusion.

Diffusion of innovations: communication channels (cosmopolite vs localite), change agent roles, and opinion leaders accelerate adoption.

Extension programme planning cycle: situation analysis → objectives → plan of work → execution → evaluation → replanning.

Audio-visual aids: charts, flash cards, flannel boards, puppets, role plays; aids increase retention and participation when matched to audience literacy.

Internal assessment components typically include practical work, project work, viva, and record/portfolio; weightage split between practical skills and theory.

Practical record must document aim, materials, method, observations, results and conclusion; accuracy and neatness are assessed.

Project work steps: select topic → formulate objectives → review literature → plan methodology → collect data → analyse → report → present.

Nutrition practicals: balanced diet planning using food exchange lists, nutrient calculation from food composition tables, and diet surveys.

Textile practicals: fibre identification by burning and solubility tests, stitch samples, pattern drafting, and garment construction with seam finishes.

Housing practicals: drawing to scale, furniture layout plans, colour schemes, and space utilization analysis.

Child development practicals: observation schedules for developmental milestones, case studies and activity planning for children.

Consumer education practicals: label analysis, price comparison surveys, and complaint drafting.

Viva questions test understanding of method and rationale, not memorized results; safety and hygiene during practicals are assessed.

Growth is quantitative and measurable; development is qualitative and functional.

Cephalocaudal and proximodistal directions govern motor development order.

Tanner stages rate pubertal development on a 1–5 scale.

Piaget's formal operational stage begins around age 11.

Erikson's adolescence stage is identity vs role confusion.

Marcia's identity statuses depend on exploration and commitment.

Kohlberg's conventional level focuses on social approval and law and order.

Weight triples by one year and quadruples by two years.

Girls' pubertal growth spurt starts about two years before boys'.

Resources divide into human (time, energy, knowledge) and non-human (money, goods, land).

Management cycle: planning, organizing, implementing, evaluating, with feedback.

Decision-making weighs alternatives and consequences before acting.

Net worth equals total assets minus total liabilities.

Priority matrices separate urgent from important tasks.

Duvall's family life cycle stages shift resource demands across time.

Resource substitution compensates scarcity of one resource with another.

Community resource mapping reveals access gaps and service overlaps.

Values and goals guide which management choices are preferred.

Energy values: carbohydrate 4, protein 4, fat 9 kcal per gram.

Balanced diet: 50–60% energy from carbohydrate, 20–30% fat, 10–15% protein.

Cereal–pulse combination supplies complementary essential amino acids.

Deficiency signs: night blindness (vitamin A), anaemia (iron), goitre (iodine), rickets (vitamin D), scurvy (vitamin C).

Fat-soluble vitamins A, D, E, K are stored and can be toxic in excess.

Danger zone for microbial growth is 5–60 °C; reheating should reach 74 °C.

Anthropometry includes weight-for-age, height-for-age, BMI and MUAC.

WHO defines health as complete physical, mental and social well-being.

Preservation methods target microorganisms, enzymes, oxidation and moisture.

Natural fibres: cotton, linen, jute (plant); wool, silk (animal).

Man-made: rayon (regenerated); polyester, nylon, acrylic (synthetic).

Cotton burns like paper with grey ash; polyester melts and beads.

Plain weave is strongest; twill shows diagonal lines; satin has lustrous floats.

Mercerization adds lustre and strength to cotton.

Sanforization controls shrinkage in cotton fabrics.

Disperse dyes are used for synthetic fibres; mordants fix natural dyes.

Seam allowance is added to the pattern, not measured on the body.

Fashion cycle: introduction, rise, peak, decline, obsolescence.

Family types: nuclear, joint, extended, single-parent, blended.

Baumrind's authoritative style combines high warmth with high control.

Attachment patterns: secure, avoidant, ambivalent, disorganized.

Play stages progress from solitary to parallel, associative, cooperative.

Family stress model: stressor, resources and perception determine crisis.

Gender roles are learned through family, school, media and peers.

Developmental domains: physical, cognitive, language, social, emotional, moral.

Positive reinforcement and logical consequences replace corporal punishment.

Parenting styles are classified by warmth and control dimensions.

Housing adequacy: space, ventilation, light, sanitation, safety, privacy.

Cross-ventilation requires openings on opposite walls.

Daylight factor = indoor illuminance ÷ outdoor illuminance × 100.

Kitchen work triangle links sink, cooking range and refrigerator.

Design principles: balance, rhythm, emphasis, proportion, scale, harmony.

Colour schemes: monochromatic, analogous, complementary, triadic.

Warm colours advance; cool colours recede visually.

Anthropometrics determines furniture sizes and clearance dimensions.

Seating groups are placed 1.5–2.5 m apart for comfortable conversation.

Consumer rights include safety, information, choice, redress, representation, education.

Consumer Protection Act 2019: District up to ₹50 lakh, State ₹50 lakh–₹2 crore, National above ₹2 crore.

Standardization marks: ISI, AGMARK, FSSAI, Hallmark, Eco-mark.

Labels must state ingredients, net quantity, nutrition information and dates.

Unfair trade practices include misleading ads and false claims; e-commerce is covered.

Keep bills, warranties and written correspondence as evidence.

Redressal path: seller → consumer association → consumer commission.

Advertising appeals: bandwagon, testimonial, snob appeal, fear appeal, bait-and-switch.

Consumer clubs and mass media build consumer awareness.

Communication model: sender, message, channel, receiver, feedback, noise.

Non-verbal communication includes gestures, posture, facial expression, proxemics.

Extension methods: individual, group and mass contact methods.

Method demonstration teaches a skill; result demonstration shows outcome.

Adoption process: awareness, interest, evaluation, trial, adoption.

Diffusion is accelerated by opinion leaders and change agents.

Programme cycle: situation analysis, objectives, plan, execution, evaluation, replanning.

Audio-visual aids increase retention when matched to audience literacy.

Listening is the most frequently used communication skill.

Internal assessment includes practical work, project, viva and record/portfolio.

Practical records follow aim, materials, method, observation, result, conclusion.

Project steps: topic, objectives, literature, methodology, data, analysis, report.

Nutrition practicals use food exchange lists and composition tables.

Fibre identification uses burning and solubility tests.

Housing practicals use scale drawings and furniture layout plans.

Child development practicals use observation schedules and case studies.

Consumer education practicals include label analysis and complaint drafting.

Viva assesses rationale and method, not memorized results.