A typhoon is essentially:
a flood
a cyclone
earthquake
none of these
When we remove polyester or woollen cloth in dark, we can see spark and hear a cracking sound. These are due to:
static electricity
current electricity
reflection of light
refraction of light
A thunderstorm is accompanied by:
lightning
cyclone
hurricane
tornado
Magnitude of earthquake is measured by:
electroscope
richter scale
seismograph
coulomb
Wind currents are generated due to:
shape of earth
change in atmospheric pressure
thunderstorm
How do cyclones decrease the fertility of the soil in the coastal areas?
by flooding the land with saline water
by dissolving soil and rocks
by increasing the water table of the place
by decreasing the water table of the place
Which of the following event can cause earthquake?
volcanic eruption
meteor hitting earth
underground nuclear explosion
all of the above
Which of the following plays an important role in the early-warning systems for cyclones?
helicopters
submarines
satellites
stars
Earthquakes can cause:
flood
land slide
tsunami
An ebonite rod rubbed with fur and a glass rod rubbed with silk cloth are brought nearer to each other. Then:
they will attract each other
they will repel each other
nothing will happen to them
they will get heated up
