Q. What are the major components of seminal plasma?

Q. What is the principle of an ideal machine?

Q. Who was known as the ‘Vidyasagar of South India’?

Q. Describe the method of obtaining salt from seawater.

Q. State the physical and chemical properties of nitrogen .

Q. What are trophic levels ? Give an example of food chain and state the different trophic level in it ?

Q. What is agriculture?

Q. State the two characteristics of resources.

Q. Name the instrument used to measure the temperature of a body.

Q. Explain the importance of alluvial soil.