Topic outline

  • Chapter 17 – Stars and Solar System – 7

    • Stars and Solar System – Questions Page

      Stars and Solar System

      Q99. Match items in column A with one or more items in column B:

      A

      B

      (i) Inner planets

      (a) Saturn

      (ii) Outer planets

      (b) Pole Star

      (iii) Constellation

      (c) Great Bear

      (iv) Satellite of the Earth

      (d) Moon

       

      (e) Earth

       

      (f) Orion

       

      (g) Mars

      Ans.

      A

      B

      (i) Inner planets

      (e) Earth, (g) Mars

      (ii) Outer planets

      (a) Saturn

      (iii) Constellation

      (c) Great Bear, (f) Orion

      (iv) Satellite of the Earth

      (d) Moon


      Q100. Explain how you can locate the Sirius Star with the help of Orion.

      Ans. The star Sirius, which is the brightest star in the sky, is located close to Orion. To locate Sirius, imagine a straight line passing through the three middle stars of Orion. Look along this line towards the east. This line will lead us to a very bright star. It is Sirius.

      Image from NCERT

       

      Q101. Draw sketches to show the relative positions of prominent stars in
      (a) Ursa Major and (b) Orion

      Ans. (a) Ursa Major

       Image from NCERT

      (b) Orion

       Image from NCERT



      Q102. Explain how you can locate the Pole Star with the help of Ursa Major. 

      Ans. Look towards the northern part of the sky and identify Ursa Major. Look at the two stars at the end of Ursa Major. Imagine a straight line passing through these stars as shown in Figure. Extend this imaginary line towards the north direction. This line will lead to a star which is not too bright. This is the Pole Star.

       Image from NCERT



      Q103. Differentiate between artificial satellites and natural satellites.

      Ans. Difference between artificial satellites and natural satellites

       

      Artificial Satellites

      Natural Satellites

      1. They are man-made. They are launched from the Earth.

      1. They are formed by nature.

      2. They are temporal.

      2. They are permanent.

      3. They are used for weather forecasting, long distance communication and remote sensing.

      3. They are not used for weather forecasting, long distance communication and remote sensing.

      4. They revolve around the Earth much closer than earth’s natural satellite, the moon.

      4. The distance between the Moon and Earth is very large.

      5. Example: Aryabhatta, INSAT, IRS, Kalpana-1, EDUSAT, etc.

      5. Example: Moon

       

    • Stars and Solar System Worksheet 19 File
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