MEDIUM
8th CBSE
IMPORTANT
Earn 100

Write the characteristics and uses of the following:

Polyester.

Important Questions on Synthetic Fibres and Plastic

HARD
8th CBSE
IMPORTANT
Sciwise - A coursebook of Science>Chapter 4 - Synthetic Fibres and Plastic>Get Ready

Complete the table given below:

  Fibres from which it is made Natural fibre / Artificial fibre
Cotton shirt    
Swimming suit    
Woollen cap    
Silk saree    
Parachute    
Jute bag    

 

HARD
8th CBSE
IMPORTANT
Sciwise - A coursebook of Science>Chapter 4 - Synthetic Fibres and Plastic>Find Out
Spandex is a lightweight, synthetic fabric known for its peculiar elasticity. What is this fibre used for?
MEDIUM
8th CBSE
IMPORTANT
Sciwise - A coursebook of Science>Chapter 4 - Synthetic Fibres and Plastic>PRACTICE TIME>Q 2
_____ is the bitter liquid present in onions.
HARD
8th CBSE
IMPORTANT
Sciwise - A coursebook of Science>Chapter 4 - Synthetic Fibres and Plastic>Think and Discuss
What problems can be faced if the use of polythene bags is banned completely? 
MEDIUM
8th CBSE
IMPORTANT
Sciwise - A coursebook of Science>Chapter 4 - Synthetic Fibres and Plastic>PRACTICE TIME>Q 3
Does plastic react with water? 
HARD
8th CBSE
IMPORTANT
Sciwise - A coursebook of Science>Chapter 4 - Synthetic Fibres and Plastic>PRACTICE TIME>Q 4
What are the uses of plastic in healthcare industry? 
MEDIUM
8th CBSE
IMPORTANT
Sciwise - A coursebook of Science>Chapter 4 - Synthetic Fibres and Plastic>EXERCISE>Q 2
What are the advantages and disadvantages of synthetic fibres?
MEDIUM
8th CBSE
IMPORTANT
Sciwise - A coursebook of Science>Chapter 4 - Synthetic Fibres and Plastic>EXERCISE>Q 2

During Diwali, thick smog clouds are seen in Delhi causing most people to wear masks and schools to shut down. What are the reasons for this happening, other than firecrackers?