Available Answers

1. 1.

   Fill in the blanks.

   1. We cannot talk on the moon due to the absence of _________________.
   2. There is no life on the moon, due to the absence of _________________ and _________________.
   3. Moon's gravity is _________________ less than that of the earth.
   4. The moon shines because it _________________ the light of the sun falling on it.
   5. Big holes found on the moon's surface are called _________________.
2. 2.

   Tick (√) the correct answer.

   1. The sun's/moon's pull of the water on the earth causes tides.
   2. Sputnik-1/Aryabhatta was India's first artificial satellite.
   3. Communication/Scientific satellite helps sending messages through the internet.
   4. The solar/lunar eclipse occurs on a new moon day.
   5. The solar/lunar eclipse occurs when the earth comes between the sun and the moon.
3. 3.

   Complete the flow chart given below.

   

4. 4.

   Choose the correct answer.

   1. Natural satellite of the earth is the ____________________.
      1. moon
      2. Aryabhatta
      3. IRS-1B
   2. The first Indian satellite to be launched in 1975 was the 
      1. Aryabhatta
      2. INSAT-2A
      3. INSAT-2D
   3. A solar eclipse occurs on a ____________________.
      1. new moon day
      2. full moon night
      3. half moon night
   4. The black spots we see on the moon are the shadows of the ____________________.
      1. craters 
      2. earth
      3. satellites
   5. In the areas between two high tides, the water forms ____________________.
      1. higher tides
      2. lower tides
      3. none of these
5. 5.

   Fill in the blanks.

   1. The _______________ is our closest neighbour in the space.
   2. Craters are formed when places of rocks called _______________ hit the surface of moon from the space.
   3. Due to the absence of _______________ on the moon, no sounds waves can travel.
   4. _______________ are man-made objects, which revolve around the earth.
   5. The highest tide occurs at the time of the _______________ moon.
6. 6.

   Match the following.

   a. Aryabhatta	i. Shadow of the earth
   b. Craters	ii. Natural satellite
   c. Moon	iii. Shadow of the moon
   d. Solar eclipse	iv. Hollow structures on the moon
   e. Lunar eclipse	v. Artificial satellite