Material X is likely a soluble, rigid substance like salt, while material Y is a soft, insoluble substance like clay. X dissolves in water, whereas Y remains unchanged, reflecting its different properties.
Category: Class 6 Science
NCERT Solutions and Important Questions for class 6 Science for CBSE exams 2020-2021.
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For food waste, use plastic containers for durability and ease of cleaning. For broken glass, use sturdy, puncture-resistant containers to avoid accidents. For wastepaper, use paper or cardboard bins for easy recycling.
Transparent containers allow us to see the contents without opening them, which helps in easily identifying the material inside. This visibility improves convenience and prevents frequent handling, ensuring the stored items remain clean and organized.
Group items by category: grains, spices, canned goods, and snacks. Store frequently used items at eye level for easy access. Use clear containers for better visibility, and label shelves for quick identification and organization.
Hardness determines a material’s resistance to scratches, dents, and wear. Hard materials like metal are used for tools and construction, while softer materials are used where flexibility or comfort is needed.
Non-biodegradable materials, like plastic, do not break down easily and accumulate in the environment. They contribute to pollution, harm wildlife, and create long-lasting waste problems, posing a significant environmental challenge.
Biodegradable materials are those that can be broken down by natural processes, like wood, cotton, and paper. They decompose into harmless substances, reducing environmental impact and contributing to sustainability.
Cotton is a natural, breathable material that is soft and comfortable. It absorbs moisture well, making it ideal for clothing. Cotton is also biodegradable and renewable, making it an environmentally friendly choice.
Glass is used for windows, bottles, and decorative items due to its transparency and smooth surface. It is also resistant to water and chemicals, making it suitable for laboratory equipment.
Materials are selected based on their properties, such as strength, flexibility, or durability. For example, metal is chosen for tools due to its strength, while plastic is used for containers because it is lightweight.