The correct relation among the following is 

(a)

Speed = distance × time

(b)

Speed = distance / time

(c)

Speed = time / distance

(d)

Speed = 1 / (distance × time)

_________is essential to perform winnowing activity.

(a)

Rain

(b)

Soil

(c)

Water

(d)

Air

The habitat of water hyacinth is

(a)

Aquatic

(b)

Terrestrial

(c)

Desert

(d)

Mountain

Birds fly in the air with the help of

(a)

heavy and strong Bones

(b)

Soft and thick Bones

(c)

Hollow and light Bones

(d)

Flat and thick Bones

Which of the following is another form of computer?

(a)

Blackboard

(b)

Mobile

(c)

Radio

(d)

Book

Electricity is produced in

(a)

transformer

(b)

power station

(c)

electric wire

(d)

television

Formation of curd from milk is

(a)

a reversible change

(b)

a fast change

(c)

an irreversible change

(d)

an undesirable change

Nitrogen is used in the food packaging industry because it ________________

(a)

provides colour to the food

(b)

provides oxygen to the food

(c)

adds proteins and minerals to the food

(d)

keeps the food fresh

Most organelles in an eukaryotic cell is found in the

(a)

Cell wall

(b)

cytoplasm

(c)

nucleus

(d)

Vacuole

Which one of the following is an input device?

(a)

Speaker

(b)

Keyboard

(c)

Monitor

(d)

Printer