Class 8ScienceSynthetic Fibres and Plastics
Plastics
Plastics are polymers โ long chains of repeating chemical units. Thermoplastics: soften on heating, can be remolded (PVC, polythene) โ recycled. Thermosetting plastics: once set, don't soften on heating (bakelite, melamine) โ used in handles, electrical fittings. Properties: corrosion-resistant, lightweight, strong, poor conductor, non-biodegradable (problem!).
10 examples
Concept check 1
For Class 8 Science, explain or solve a plastics question from the chapter "Synthetic Fibres and Plastics". Focus on concept check and show the working clearly.
Definition to application 2
For Class 8 Science, explain or solve a plastics question from the chapter "Synthetic Fibres and Plastics". Focus on definition to application and show the working clearly.
Formula warm-up 3
For Class 8 Science, explain or solve a plastics question from the chapter "Synthetic Fibres and Plastics". Focus on formula warm-up and show the working clearly.
Reasoning practice 4
For Class 8 Science, explain or solve a plastics question from the chapter "Synthetic Fibres and Plastics". Focus on reasoning practice and show the working clearly.
Board-style short answer 5
For Class 8 Science, explain or solve a plastics question from the chapter "Synthetic Fibres and Plastics". Focus on board-style short answer and show the working clearly.
Mistake correction 6
For Class 8 Science, explain or solve a plastics question from the chapter "Synthetic Fibres and Plastics". Focus on mistake correction and show the working clearly.
Visual interpretation 7
For Class 8 Science, explain or solve a plastics question from the chapter "Synthetic Fibres and Plastics". Focus on visual interpretation and show the working clearly.
Applied word problem 8
For Class 8 Science, explain or solve a plastics question from the chapter "Synthetic Fibres and Plastics". Focus on applied word problem and show the working clearly.
Revision challenge 9
For Class 8 Science, explain or solve a plastics question from the chapter "Synthetic Fibres and Plastics". Focus on revision challenge and show the working clearly.
Exam recap 10
For Class 8 Science, explain or solve a plastics question from the chapter "Synthetic Fibres and Plastics". Focus on exam recap and show the working clearly.