PRACTICE QUESTIONS (COMPETITION WING)

In how many days do silkworm eggs hatch into larvae?

How does the hair of certain animals help in keeping their bodies warm?

In the life history of the silk moth, as Egg → Larva (or caterpillar) → Pupa→ Silk moth, which stage actually makes the silk fibre?

Sheep are herbivores, so which type of feed (or food) should be provided by shepherds?

Four different types of fibres are given to us. Out of these, two fibres (1 and 2) are obtained from plants and other two (3 and 4) fibres are obtained from animals. Fibre (1) is used in filling quilts and the yarn made of fibre (2) is used in making gunny bags. The yarn made from fibre (3) is used for knitting sweaters and yarn of fibre (4) is used for weaving saries. Name the four given fibres marked 1, 2, 3 and 4.

Radhika wanted to buy a silk frock and went to the market with her mother. There they found that the artificial (synthetic) silk was much cheaper and wanted to know why? Do you know why? Find out.

From what type of health problems did the workers suffer while working in the wool industry?

Rashmi went to the market to buy sarees for her mother. She took out a thread from the edge of the two sarees shown by the shopkeeper and burnt them. One thread burnt with the smell of burning hair and the other burnt with the smell of burning paper. Which thread is from a pure cotton saree and which one is from a pure silk saree? Give reasons for your answer.