Available Answers

1. 1.

   Fill in the blanks.

   1. Sound is produced when a body ____________.
   2. The method of coating a metal with a layer of another metal using electric current is called ____________.
   3. The shock waves of the earthquake are called ____________.
   4. During electrolysis, the object to be plated is made the ____________.
2. 2.

   Find the odd one out:

   1. Focus, Cornea, Iris, Pupil
   2. Andromeda, Milky Way, Great Bear, Pole Star
   3. Forest fire, Grass fire, Pollen grains, Water pollution
   4. Mars, Venus, Earth, Orion
3. 3.

   Name the chemical responsible for blue baby syndrome.
4. 4.

   What is the SI unit of frequency?
5. 5.

   Who invented the Braille system?
6. 6.

   What is the distance travelled by light in one year known as?