Give example of Rabi crop

2

(a)

Give names of two traditional methods and two modern methods of irrigation

2

(a)

Is there any advantage of using a cultivator?

2

(a)

What are organic foods?

2

(a)

How can a farmer increase the fertility of the soil?

2

(a)

Two special chemicals are used as food preservatives. What are these?

2

(a)

An ingredient added to idlis and bhatura to make them soft. What is it?

2

(a)

Name the unit used in the formation of a polymer.

2

(a)

What is polyester?

2

(a)

Name two metals which are good conductors of both heat and electricity.

2

(a)

Why is water used by fire brigade to extinguish fire?

2

(a)

What do you understand by Endemic species. Name two endemic flora and fauna.

2

(a)

How is egg formed in the hen?

2

(a)

What is the magnitude of the force when it acts in the opposite directions on an object?

2

(a)

What are the interactions of poles of two magnets?

2

(a)

When does rolling friction come into play?

2

(a)

What are the causes of sparking?

2

(a)

Vision is one of the wonderful gifts given to us by God. But most of the people never take care of their eyes. Care of eyes should be taken. Suggest some methods for proper eye care.

2

(a)

What are celestial objects?

2

(a)

Why does pole star not appear to be moving?

2

(a)