YADNYA e-Learning
Science Studies - 7th Standard
10. Disaster Management
Question & Answer
1. Find the odd man out.
(a) Famine, earthquake, cloudburst, railway accident.
Ans: Railway accident
(b) Drought, heavy rains, storm, tsunami.
Ans: Drought
(c) Lava, hot mud, ash, locusts.
Ans: Locusts
(d) Washing away of crops, attack of pests on crops, volcano,
singeing of crops
Ans: Volcano
2. What are the remedial measures for the following calamities?
(a) Famine
Ans: Remedial measures for famine are:
Planned usage of water and its reuse.
We should avoid wastage of food and water.
Plant more and more trees to prevent soil erosion.
Adopting water harvesting methods to conserve rain water.
(b) Lightning strike
Ans: Remedial measures for lightning strike are:
If outdoor:
1. Avoid taking shelter under trees.
2. Avoid being near to any kind of metal objects which may include metal wires, fences, machinery and power appliances.
3. Take shelter inside a fully enclosed car with all the windows shut.
If indoor:
1. Turn off all the electrical appliances such as television and refrigerator.
(c) Storm
Ans: Remedial measures for storm are:
Do not stand on open ground, below a tree, near electric
poles or on high locations.
Gathering together at one place should be avoided.
Get down from vehicles like bicycle, tractor, boat, etc.
and go to a safer place.
Swimmers and fishermen should immediately come out
of the water.
(d) Cloudburst
Ans: Remedial measures for cloudburst are:
Pay heed to warning issued by the Meteorological department carefully.
Do not take shelter at the foot of a hill’.
Be ready with your first-aid kit and other necessary equipment's.
Use battery operated radios and mobiles.
3. True or false? Give reasons for your answer.
(a) Information about a forthcoming storm is to be kept secret.
Ans: The statement given is a false statement. Infact,
information regarding a forthcoming storm should be
propagated to everyone. This will enable everyone to get
prepared for this natural disaster. Everyone will be equipped
with all the precautionary measures needed to be taken
during the storm.
(b) You should not swim when there is lightning in the sky.
Ans:The statement given is a true statement. This is because
the water in the water bodies in which we swim are good
conductors of electricity. Also, a wet person is more
conductive than a dry person. Due to this, our body inside the
water will become very prone to lightning strike. It could
cause severe burns or might kill us if lightning falls on our
wet body.
(c) It is possible to prevent the eruption of a volcano.
Ans: No, it is not possible to prevent or control the eruption
of a volcano. However, by means of science and technology, it
is possible to predict an eruption and take immediate steps
for disaster management.
(d) Heavy rains result in famine.
Ans: Heavy rains may cause flood in a region. Due to this,
food crops, plants etc. of that region are going to get washed
away. Also, the land of that region will lose it fertility and
would require sometime to regain it. Because of these
reasons, the region will be affected by famine. Thus, we can
say, heavy rains result in famine.
4. Write answers to the following questions in your own words.
(a) What is a tsunami ? What gives rise to a tsunami ?
Ans: A tsunami is a series of waves caused by the
displacement of a large volume of water, generally in an
ocean. These waves are generated by an earthquake or
volcano erupting on the ocean floor.
(b) What is a cloudburst ?
Ans: A sudden rainstorm falling for a short period of time and
to a small geographical area at the rate of 100 mm per hour
or more is known as cloudburst.
(c) Explain the effects of a volcano.
Ans: Various effects of volcano are:
Volcanoes add up to the greenhouse gases by ejecting
ash and various gases.
Temperature increases due to hot gases.
Forests and settlements get buried under the hot mud.
Mountains and hills are created after volcanic eruption.
(d) What are the measures to prevent loss of life due to lightning?
Ans: To prevent loss of life due to lightning, following
measures can be taken
If outdoor:
1. Avoid taking shelter under trees.
2. Avoid being near to any kind of metal objects which may
include metal wires, fences, machinery and power appliances.
3. Take shelter inside a fully enclosed car with all the
windows shut.
If indoor:
1. Turn off all the electrical appliances such as television and
refrigerator.
2. Avoid bathing or showering.
5. What measures have been taken to deal with calamities such as
floods and landslides under the disaster management programme
in Maharashtra ?
Ans: Following are the measures taken by Maharashtra
government to deal with calamities such as floods and
landslides under the disaster management programme:
It ensured that all 36 districts in the state will have their
own disaster management plans. The district-level
disaster management plan has detailed information
about geographical details, population, flood-prone
areas, villages and other macro details. The plan also
deals extensively with the emergency and evacuation
measures to be taken up in cases of heavy downpour,
flash floods, landslides, lightning strikes and other
natural calamities.
A disaster management orientation training programme
will be launched soon in 100 schools in every
district. The government also decided to impart master
trainers training for 50 school teachers from all these
schools.
Maharashtra School Security Programme will be set up
under which steps will be taken to ensure protection of
schools and other educational institutions during and
after natural disasters.
The Maharashtra State Disaster Management Plan also
consists of special provisions for dealing with women,
children, the aged, handicapped and animals.
6. With reference to disaster management what are the things in
your house that you will check?
Ans: With reference to disaster management, the following
things in the house needs to be checked:
Check whether there are cracks developed on walls or
not If yes, get the repairing done as soon as possible.
Check whether glass panes and windows are tightly
secured or not If not get it done urgently.
Check whether bulky things hanging from ceiling or
walls like chandelier etc are tightly secured or not If not
get it done urgently.
Check whether there are any broken electric live wires
or not If yes, call the electrician and get it repaired
urgently.
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