NCERT Class VIII Science Solutions: Chapter 17-Stars and the Solar System Part 5

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Question 20:

Fig shows comets without their tail. Show the tails of the comets at position A, B, and C. In which position will the tail be longest?

As showing in fig is a comets without their tail.(Q)

Comets Without Their Tail.(Q)

As showing in fig is a comets without their tail.(Q)

Answer:

The tail will be longest at position B

As showing in fig is a comets without their tail.(A)

Comets Without Their Tail.(A)

As showing in fig is a comets without their tail.(A)

Question 21:

Explain why we always see the same side of moon.

Answer:

This is because the period of rotation of the moon on its axis is equal to the period of its revolution round the earth.

Question 22:

Look at Fig carefully and answer the following question:

As showing in fig is a eastern and western part of the sky

Eastern and Western Part of the Sky

As showing in fig is a eastern and western part of the sky

  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?

Answer:

  1. In the eastern part of the sky

  2. In the western part of the sky