Learn Class 8 Science - Synthetic Fibres and Plastics

We all wear different styles of cloth in our daily life. And all those clothes materials will include different fabrics. Either it is a synthetic fibre, natural fiber, or polymer. So always it becomes a concern how they differ from each other?

Fibre:

What is fibre? Isn't it the material which is used in clothes? Or what is it?

  • Fibre is the only material that helps in the development of fabric.
  • And this fabric also designs the home things.

Polymer:

The word 'Polymer' consists of two words, I.e., Poly(many) +mer(unit).

  • It includes many units.
  • And it is also known as a larger unit. Further, which helps in making the 'fibre & fabric.'

1. Synthetic Fibre:

Synthetic fibres are human-made fibres. And are:

  • Durable
  • Easily affordable
  • For e.g., Nylon & Rayon

2. Natural Fibre:

Have you heard about fibre coming from animals & plants? Yes, these are among those only!

  • e.g.Cotton, silk, and wool.

3. Plastics:

What is plastic? You can define plastic-like. It is only a material that is similar to synthetic fibre.

Thermoplastics:

  • Most flexible plastics!
  • Ease to bend (it resolve with heating)

Thermosetting plastics:

  • Hard plastics!
  • Bend only once, i.e., with a one-time heating process only.

Learning Videos for 8th Grade Science - Synthetic Fibres and Plastics

Synthetic Fibres and Plastics Sample Questions for Class 8

Question 1

Which type(s) of numbers does scientific notation best describe?
A. very small only
B. very large only
C. very small and very large
D. large and small combined

Question 2

Diffusion in gases occurs quickly because
A. the particles are very small.
B. the particles move around very fast.
C. gases are very compressible.
D. the particles are in fixed positions.

Question 3

Plastics, paints, and DNA are examples of .
A. metals
B. crystals
C. polymers
D. metallic bonds

Question 4

Why does the cerebral cortex have so many folds and bumps?
A. They help to keep your brain in place if you get bumped hard.
B. They give neurons more surface area without having to have a giant head.
C. They allow your brain to spread out more as you get older and larger.
D. They mean your brain has too much knowledge stored in it.

Question 5

Clouds that look like fluffy, round piles of cotton are called .
A. cirrus
B. lenticular
C. cumulus
D. stratus