Tiêu đề Class 6 Science (Curiosity) Chapter 6- Materials Around Us Book Solution with notes.pdf ✅

Class VI Science (Curiosity) Book Solution with Key Notes/Points © kvsecontent.com Historical Context: The earliest pottery in the Indian subcontinent dates back 7,000-8,000 years in: ▪ Ganga plains (Lahuradewa) ▪ Baluchistan (Mehrgarh) Sindhu-Sarasvatī Civilization (2600-1900 BCE) developed advanced pottery techniques: ▪ Wheel-turned pottery production ▪ Pigmentation ▪ Application of protective/decorative coats (called 'slips') ▪ Multiple colour usage ▪ Decorative painting Measurement Concepts: Mass: Quantity of matter in an object (measured in grams-g or kilograms-kg) Volume: Space occupied by matter (measured in litres-L or millilitres-mL) Note: The SI unit for volume is cubic metre (m3), where 1 m3 = 1000 L Classification: Definition: Method of arranging objects into groups based on common properties Purpose: Helps study patterns and organize materials based on similarities and differences Can be done based on various properties like hardness, transparency, solubility, etc. Scientific Writing Conventions: ▪ Kilogram (kg): No space between 'k' and 'g', no period after unless at sentence end ▪ Units should have a space between number and unit (e.g., 7 kg not 7kg) ▪ Litre is abbreviated as 'L' (capital) ▪ Millilitre as 'mL' (no space between 'm' and 'L') ▪ Cubic metre written as m3 with superscript Practical Applications: ORS (Oral Rehydration Solution) preparation demonstrates solubility ▪ Six teaspoons sugar ▪ Half teaspoon common salt ▪ One litre boiled and cooled water
Class VI Science (Curiosity) Book Solution with Key Notes/Points © kvsecontent.com Additional Properties: ▪ Some gases can dissolve in water (e.g., oxygen - important for aquatic life) ▪ Some liquids can mix with water while others form separate layers ▪ Materials can lose their properties over time (e.g., metals losing lustre due to air and moisture) Recycling and Materials: ▪ Materials can be recycled based on their properties ▪ Properties determine recyclability and reuse potential ▪ Different materials have different recycling values Traditional Knowledge: Ayurvedic classification includes 10 pairs of opposite properties (20 total), including: i. guru (heavy) - laghu (light) ii. manda (slow) - tīkṣhṇa (quick) iii. hima (cold) - uṣhṇa (hot) iv. snigdha (unctous) - rukṣha (dry) v. śhlakṣhaṇa (smooth) - khara (rough) vi. sāndra (solid) – drava (liquid) vii. mṛidu (soft) - kaṭhina (hard) viii. sthira (stable) - khāla (moving, unstable) ix. sūkṣhma (subtle, small) - sthūla (big, gross) x. viśhada (non-slimy) - picchhila (slimy Important Points: ▪ One object can be made from multiple materials ▪ Different materials can be used to make similar objects ▪ Choice of material depends on its properties and intended use ▪ Properties of materials determine their suitability for specific purposes ▪ Ancient Indian texts like Ayurveda had their own classification systems for materials based on 20 paired properties.
Class VI Science (Curiosity) Book Solution with Key Notes/Points © kvsecontent.com Question-Answer Session Q. What does Madam Vidya ask the students to observe? Ans. Madam Vidya asks students to observe: ▪ How things they use daily are similar to or different from each other ▪ Their shapes and colours ▪ How they feel when touched ▪ If some objects are heavier than others Q. What is a material? Ans. A material is any substance that is used to create an object. Q. What is Activity 6.1 about? Ans. Activity 6.1 "Let us identify" asks to- ▪ Make a list of objects they see around them ▪ Write down the materials these objects are made of in Table 6.1 ▪ Based on observations, conclude that objects are made of various materials Activity 6.1: Let us identify Objective- Make a list of objects you see around and also write the names of the materials they are made up of in Table 6.1. Table 6.1: Identify materials I observe Materials they are made up of Pencil Wood and graphite; rubber eraser Notebook Paper, cardboard (cover), metal (staples) School desk Wood/plywood and metal (steel/iron) Water bottle Plastic or stainless steel Clock Glass, plastic, metal (internal parts) Mobile Glass, plastic, metal (various types), silicon Chair Wood/plastic/metal (depending on type) Whiteboard Plastic/metal surface, aluminium frame Window Glass, wood/metal frame School bag Fabric (nylon/polyester), plastic, metal (zippers) Lunch box Plastic/stainless steel Ruler Plastic/wood/metal Door Wood/metal, metal hinges Fan Metal (blades and body), plastic Light bulb Glass, metal filament