Given below is a list of words. Find a suitable word to describe each word, with the unique sound associated with it. Then classify the sounds as 'natural' and those caused by human activity. Work in pairs.

Eg. : the roaring of waves

i) The humming of a bee

Classification of sound: natural

Note: The sound associated with bees can be either ‘buzzing’ or ‘humming’. Any one out of the two can be used. Certainly, it is a natural sound.

ii) The chirping of a bird

Classification of sound: natural

iii) The shrieking of a sawmill

Classification of sound: human activity

iv) The screeching of a wheel

Classification of sound: human activity

v) The honking of a car horn

Classification of sound: human activity

vi) The blaring of a jet engine

Classification of sound: human activity

vii) The rumbling of thunder

Classification of sound: natural

viii) The ringing of a bell

Classification of sound: human activity

ix) The strumming of musical notes

Classification of sound: human activity

x) The burbling of a stream

Classification of sound: natural

xi) The roaring of a lion

Classification of sound: natural

xii) The gushing of a waterfall

Classification of sound: natural