Chapter 12 Solutions — Beyond Earth

Let Us Enhance Our Learning

1. 1.
   Match the column: Column I

   • (i) Satellite of Earth
   • (ii) Red planet
   • (iii) Constellation
   • (iv) Planet which is commonly called an evening star Column II
   • (a) Orion
   • (b) Venus
   • (c) Mars
   • (d) Moon
2. 2.
   Solve the following riddle: My first alphabet is in MAN but not in CAN My second alphabet is in ACE and also in FAN My third alphabet is in RAT and not in CAT My fourth alphabet is in SUN but not in FUN I am a planet that moves around the Sun. (ii) Make two similar riddles by yourself.
3. 3.
   Which of the following is not a member of our Solar System?

   • (i) Sirius
   • (ii) Comets
   • (iii) Asteroids
   • (iv) Pluto
4. 4.
   Which of the following is not a planet of the Sun?

   • (i) Jupiter
   • (ii) Pluto
   • (iii) Neptune
   • (iv) Saturn
5. 5.
   Which is the brighter star, the Pole Star or Sirius?
6. 6.
   An artist's representation of the Solar System is given in Fig. 12.12. Is the order of the planets correct? If not, write the correct order in the boxes in the figure.
7. 7.
   A portion of night sky with stars is shown in Fig. 12.13. Look carefully and identify the groups of stars that form the patterns — the Big Dipper and the Little Dipper. Draw lines to connect the stars for these patterns and label them. Also, identify and label the Pole Star. You may refer to Fig. 12.4 for help.
8. 8.
   A portion of the night sky is shown in Fig. 12.14. Draw lines to connect the stars for Orion and label the star Sirius. You may refer to Fig. 12.3.
9. 9.
   From Earth, you can see stars fading away at dawn and appearing at dusk. During the day we do not see the stars. Explain why.
10. 10.
    During a clear night, try to observe the Big Dipper 3-4 times at an interval of 2 to 3 hours. Also try to locate the Pole Star each time. Does the Big Dipper appear to move? Draw a rough sketch to illustrate this, mentioning the time in each case.
11. 11.
    Think about the night sky and write a poem or a story on it.