WorksheetsSome Natural Phenomena
Total questions: 25
Worksheet time: 13mins
A natural phenomenon, whose triggering is not associated with an earthquake, is
Tsunami
Landslide
Flood
Eruption of volcano
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
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
Which of the following cannot be charged by friction?
Plastic Scale
Copper rod
Inflated balloon
Woollen cloth
Two objects rubbed against each other
will lose electrons
one will loses and the other will gain electrons
will gain electrons
none of these
The point where the shock-waves of an earthquake originate is called
epicenter
focal depth
seismic focus
none of these
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
The electroscope is a device which is used to find if an object is
charged
free of cracks
magnetic
hot
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
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
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
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
In which of the following processes is physical contact not required?
Friction
Induction
Conduction
None of them
Static electricity charges can be produced by
Heating
Rubbing
Beating
Hammering
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
The process of transferring a charge from a charged body to the earth is called
Hydrolysis
Electrolysis
Earthing
Discharging
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
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
Which of the following occurs during lightning?
Nitrogen fixation
Greenhouse effect
Acid rain
None of these
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
Any object can be charged by which of the following method?
friction
contact
induction
all of these
Seismograph is an instrument used to
Record strength of wind
Record vibrations of earthquake
Record lightning
Record temperature
During lightning, air is normally
a good conductor
a poor conductor
both, a good conductor and poor conductor
None of these
Sparks can be seen on an electric pole when wires become
loose
tight
wrinkled
shorter
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
