Some Natural Phenomena

1.

Multiple Choice

30 sec

1 pt

A natural phenomenon, whose triggering is not associated with an earthquake, is

Tsunami

Landslide

Flood

Eruption of volcano

2.

Multiple Choice

30 sec

1 pt

The epicentre of an earthquake is

deep under the crust of earth

in the mantle of earth

on the surface of earth

in the core of earth

3.

Multiple Choice

30 sec

1 pt

The magnitudes of two earthquakes, A and B, on the Richter scale, were 7 and 5, respectively. The strength of

earthquake A is 100 times that of earthquake B

earthquake A is 10 times that of earthquake B

earthquake A is 2 times that of earthquake B

Earthquake A is 1/10 times that of earthquake B

4.

Multiple Choice

30 sec

1 pt

Which of the following cannot be charged by friction?

Plastic Scale

Copper rod

Inflated balloon

Woollen cloth

5.

Multiple Choice

30 sec

1 pt

Two objects rubbed against each other

will lose electrons

one will loses and the other will gain electrons

will gain electrons

none of these

6.

Multiple Choice

30 sec

1 pt

The point where the shock-waves of an earthquake originate is called

epicenter

focal depth

seismic focus

none of these

7.

Multiple Choice

30 sec

1 pt

The shock waves produced by an earthquake travel

along the surface

deep inside the earth

only in the air

both, one the surface and inside the earth

8.

Multiple Choice

30 sec

1 pt

The electroscope is a device which is used to find if an object is

charged

free of cracks

magnetic

hot

9.

Multiple Choice

30 sec

1 pt

Electric current is to be passed from one body to another. For this purpose, the two bodies must be joined by

cotton string

copper wire

plastic string

rubber band

10.

Multiple Choice

30 sec

1 pt

Two charged objects are brought close to each other. Choose the most appropriate statement from the following options:

they may attract each other

they may repel each other

they may attract or repel depending on the type of charges they carry

there will be no effect

11.

Multiple Choice

30 sec

1 pt

The earth's plate responsible for causing earthquakes is

the crust of the earth

the mantle of the earth

the inner core of the earth

the outer core of the earth

12.

Multiple Choice

30 sec

1 pt

What is the best thing to do during a thunderstorm?

Stay indoors

Wear dark glasses and watch it

Stay close to metal fence

Stand on an open terrace

13.

Multiple Choice

30 sec

1 pt

In which of the following processes is physical contact not required?

Friction

Induction

Conduction

None of them

14.

Multiple Choice

30 sec

1 pt

Static electricity charges can be produced by

Heating

Rubbing

Beating

Hammering

15.

Multiple Choice

30 sec

1 pt

Lightning conductor is installed on a building

to collect the electric power present in the building

to repel the lightning that falls on the building

to force the lightning to fall in an area where there are no buildings

to conduct electric charge to the ground when lightning strikes the building

16.

Multiple Choice

30 sec

1 pt

The process of transferring a charge from a charged body to the earth is called

Hydrolysis

Electrolysis

Earthing

Discharging

17.

Multiple Choice

30 sec

1 pt

Imagine your are in a car and the stuck up in a thunderstorm. Which of the following is the best way to protect yourself from possible harms?

Remaining in the car

Getting out of the car and taking cover under the car

Running to a nearby tree

Getting out and standing under an electric poll

18.

Multiple Choice

30 sec

1 pt

We hear a thunder because

a lot of energy is released

air heats up and explodes

a lot of charge goes in lightning

clouds bang against each other

19.

Multiple Choice

30 sec

1 pt

Which of the following occurs during lightning?

Nitrogen fixation

Greenhouse effect

Acid rain

None of these

20.

Multiple Choice

30 sec

1 pt

When a glass rod is rubbed with silk, then glass rods acquires

negativ charge

positive charge

sometimes negative charge and sometimes positive charge

No charge

21.

Multiple Choice

30 sec

1 pt

Any object can be charged by which of the following method?

friction

contact

induction

all of these

22.

Multiple Choice

30 sec

1 pt

Seismograph is an instrument used to

Record strength of wind

Record vibrations of earthquake

Record lightning

Record temperature

23.

Multiple Choice

30 sec

1 pt

During lightning, air is normally

a good conductor

a poor conductor

both, a good conductor and poor conductor

None of these

24.

Multiple Choice

30 sec

1 pt

Sparks can be seen on an electric pole when wires become

loose

tight

wrinkled

shorter

25.

Multiple Choice

30 sec

1 pt

By convention, the charge acquired by glass rod when it is rubbed with a silk cloth is

positive

negative

either positive or negative

no charge

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