Understanding Natural and Man-Made Fibers

Which of the following materials is NOT required for the fiber experiment?

• Nylon

• Glass

• Wool

• Cotton

What happens to wool when it is burned in the flame?

• It melts and forms a lump.

• It burns completely.

• It changes color but does not burn.

• It emits a sweet smell.

How does nylon behave when exposed to a flame?

• It turns into ash.

• It melts and forms a lump.

• It burns completely.

• It remains unchanged.

Which of the following is a characteristic of natural fibers?

• They melt before burning.

• They are non-biodegradable.

• They burn without melting.

• They are made from synthetic materials.

Why is it advised not to wear synthetic clothes near a flame?

• They are too expensive.

• They can catch fire easily and melt.

• They are uncomfortable.

• They are not fashionable.