Q1
Plastic is an example of a:
Aman-made material
Bnatural material
Cbiodegradable material
Dliving material
CBSEClass 6 (CBSE)ScienceCh 6 · Topic 2
Natural and Man-made Materials
Classifying materials as naturally occurring or man-made.
Core concept
Natural materials are often biodegradable, meaning they break down naturally over time, while many synthetic materials like plastic can take hundreds of years to decompose, contributing to pollution if not disposed of properly. Synthetic materials were developed to be cheaper, more durable, or to have properties not found in natural materials — for instance, nylon is stronger and more elastic than natural silk, which is why it's used in ropes and parachutes.
Exam highlight
Key diagram
- Show a sorting activity classifying wood, cotton, plastic and nylon into natural vs man-made.
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Quick notes
• Natural materials: wood, cotton, wool, clay — come directly from nature.
• Man-made/synthetic materials: plastic, nylon, polyester — created through factory processes.
• Natural materials are often biodegradable; many synthetic materials are not.
• Synthetic materials are often developed for durability or properties not found in nature.