Q. What are fermentors?

Q. What is the smallest particle of a compound?

Q. What is back cross?

Q. Describe the agricultural use of plough.

Q. What are the qualities of an ideal source of energy?

Q. What is meant by supersonic speed ?

Q. (a) Define matter. Give four examples of matter.(b) What are the characteristics of matter ?

Q. Name the important food crops of India.

Q. What do you mean by the equilibrium of a body?

Q. Who do you think is speaking to her?