Secondary School (English Medium) (5 to 8) इयत्ता ८ - CBSE Question Bank Solutions for Science

Do all the stars in the sky move? Explain.

Why is the distance between stars expressed in light years? What do you understand by the statement that a star is eight light years away from the Earth?

Explain circumstances leading to acid rain. How does acid rain affect us?

Describe the threat to the beauty of the Taj Mahal.

Which of the following statements is not true for organic manure?

Which activity of the farmer can promote growth of earthworms and microbes in the field?

Unscramble the jumbled word underlined in the following statement.

Curbossulite is an air-borne disease caused by a bacterium

Match the microorganisms given in the Column A to the group to which they belong in Column B.

Pick the synthetic fibre out of the following.

The material similar to silk in appearance is ______.

The most suitable material for the preparation of handles of cooking utensils is ______.

Which of the following groups contain all synthetic substances?

Cotton is a natural polymer. What is its chemical name?

A synthetic fiber which looks like silk is obtained by chemical treatment of wood pulp. It is, therefore, known as artificial silk. What is its common name?

The synthetic fibres are also known as ______ fibres.

The first fully synthetic fibre was ______.

Unscramble the jumbled word given below, related to synthetic material.

Anory

Indicate whether the following statement is True or False. Also write the false statement in their correct form.

Synthetic fibres do not melt on heating

Indicate whether the following statement is True or False. Also write the false statement in their correct form.

It is risky to wear synthetic clothes while working in the kitchen

Write the importance of synthetic polymers in our life.