Science (Sorting Materials into Groups) (Part 1 & Part 2) Covers the Following Topics

1. Objects Around Us

• Variety of Objects
  • Examples of objects with different shapes, colors, and uses.
• Grouping Objects
  • Grouping based on shape (e.g., round objects like apples, oranges).
  • Grouping based on material (e.g., plastic objects like buckets, toys).
• Materials Used to Make Objects
  • Examples of materials: glass, metal, plastic, wood, cotton, paper, mud, and soil.
  • Importance of identifying materials used to make objects.

2. Properties of Materials

• Why Materials are Chosen
  • Suitability based on properties and purpose (e.g., a tumbler cannot be made of cloth).
• Specific Properties
  • Appearance: Shiny (lustrous) or dull, smooth or rough.
  • Hardness: Hard (resists compression) vs. soft (easily compressible).
  • Solubility:
    • Soluble materials (e.g., salt, sugar).
    • Insoluble materials (e.g., chalk powder, sand).
    • Liquids that mix with water (e.g., vinegar, lemon juice) vs. those that don’t (e.g., oil, kerosene).
  • Floating or Sinking:
    • Objects that float (e.g., cork, wood).
    • Objects that sink (e.g., stone, metal).
  • Transparency:
    • Transparent (e.g., glass, clear plastics).
    • Translucent (e.g., frosted glass, oiled paper).
    • Opaque (e.g., wood, metal).

3. Why Do We Group Materials?

• Purpose of Grouping:
  • Organizing materials for convenience.
  • Easier study of properties and patterns.
• Examples of Grouping:
  • Grouping biscuits, soaps, and grains in shops.
  • Grouping based on properties like transparency or solubility.
  • Matching objects to materials.
  • True/False statements about material properties.
  • Grouping objects by properties (e.g., edible vs. non-edible, round vs. other shapes).
  • Identifying objects that float or sink.
  • Selecting odd ones out based on material properties.
  • Memory games to identify objects based on specific properties.
  • Grouping objects by shared properties (e.g., transparency, solubility).
  • Observing patterns among grouped materials (e.g., lustrous materials conducting electricity).

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