class5-sst revision3 THE AGE OF MACHINES

WORKSHEET-2

THE AGE OF MACHINES

I.Tick the correct answer:

1.Generators are used to produce

a)electricity b)water c)solar power d)wind energy

A.a

2.Which of the following is got from petroleum?

a)coal b)solar energy c)kerosene d)clay

A.c

3.The first person to make a small battery which could produce electric current in a wire was

a)Alessandro Volta b)Alexander Fleming

c)Graham Bell d)James Watt

A.a

4.The first metal to be discovered was

a)copper b)iron c)bronze d)gold

A.a

5.Tools and weapons were made sharper and stronger with the use of

a)copper b)iron c)bronze d)gold

A.b

6.Industrial Revolution began in_____.

a)Germany b)Delhi c)Britain d)Rome

A.c

7.Hydroelectricity is produced by

a)still water b)frozen water c)flowing water d)boiling water

A.c

8.Bronze is a mixture of_____ and _____.

a)coal ,iron b)lead,copper c)gold,silver d)copper ,tin

A.d

9._________ used acrros the rivers are used to produce hydroelectricity

a)roads b)dams c)cities d)airports

A.b

10.Which source of energy does not cause pollution

a)coal b)petrol c)diesel d)wind

A.d

II.Give one word for:-

1.A device that makes task easier__________.

A.machine

2.Production of goods ,especially in factories______.

A.industry

3.A machine that produces electricity_________.

A.generator

4.Electricity produced by the use of flowing water__________.

A.hydroelectricity