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

An astronaut standing on the surface of the moon throws a ball upwards. The ball would

The first of a month is the new moon day. On fifteenth of the same month, which of the following figures would represent the phase of the moon?

John saw full moon on a particular day. After how many days will he be able to see the full moon again?

Why does the moon change its shape daily?

Paheli saw the moon through a glass window at 8:00 pm. She marked the position of the moon on the glass pane. She got up at 4 am in the morning. Will the moon be visible at the same position?

Explain why we always see the same side of moon.

Look at the figure carefully and answer the following question:

1. In which part of the sky would you see the full moon in the evening?
2. In which part of the sky would you see the crescent moon in the evening?

Match the following:

Write a paragraph in your own words of the following.

Preparation of soil

Yeast is used in the production of ______.

The following is an antibiotic.

The bread or idli dough rises because of ______.

The process of conversion of sugar into alcohol is called ___________.

What are antibiotics?

Explain why some fibres are called synthetic.

Mark (✓) the correct answer:

Rayon is different from synthetic fibres because

Fill in the blanks with appropriate words.

Synthetic fibres are also called ______ or _______ fibres.

Fill in the blanks with appropriate words.

Synthetic fibres are synthesised from raw materials called ______

Give examples which indicate that nylon fibres are very strong.

Rana wants to buy shirts for summer. Should he buy cotton shirts or shirts made from synthetic material? Advise Rana, giving your reason.