The correct relation among the following is 

(a)

Speed = distance × time

(b)

Speed = distance / time

(c)

Speed = time / distance

(d)

Speed = 1 / (distance × time)

Lighter impurities like dust when mixed with rice or pulses can be removed by __________

(a)

filtration

(b)

sedimentation

(c)

decantation

(d)

winnowing

Organs of absorption is__________

(a)

Root

(b)

Stem

(c)

Leaf

(d)

Flower

Which animal has the special organs of breathing called gills?

(a)

Earthworm

(b)

Fox

(c)

Fish

(d)

frog

We should include fruits and vegetables in our diet, because _______.

(a)

They are the best source of Carbohydrates

(b)

They are the best source of Proteins

(c)

They are rich in minerals and Vitamins

(d)

They have high water content

Who is the computer’s first programmer?

(a)

Lady Wellington

(b)

Augusta ado Lovelace

(c)

Mary Curie

(d)

Mary Comb

Drying of wet clothes in air is an example of

(a)

Chemical change

(b)

Undesirable change

(c)

irreversible change

(d)

physical change

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

Mariner’s compass is used to find the

(a)

speed

(b)

displacement

(c)

direction

(d)

motion