TN Board Class 8 Social Science Unit 5 Hazard
If you are looking for TN Board Class 8 Social Science Unit 5 Hazard Backpage exercises then you are at the right place .here we are providing the chapter solutions of textbook.
I Choose the correct answer
_______________ percentage of nitrogen is present in the air.
a) 78.09%
b) 74.08%
c) 80.07%
d) 76.63%
1- a) 78.09%
Tsunami in Indian Ocean took place in the year _________.
a) 1990 b) 2004
c) 2005 d) 2008
2- b) 2004
The word Tsunami is derived from __________ language.
a) Hindi
b) French
c) Japanese
d) German
3- c) Japanese
The example of surface water is
a) Artesian well b) Groundwater
c) Subsurface water d) Lake
4- d) Lake
Event that occurs due to the failure of monsoons.
a) Condensation b) Drought
c) Evaporation d) Precipitation
5- b) Drought
II Fill in the blanks
- Hazards may lead to_______.
- Landslide is an example of _______ hazard.
- On the basis of origin, hazard can be grouped into _______ categories.
- Terrorism is an example of _______ hazard.
- Oxides of Nitrogen are _______pollutants which affects the human beings.
- Chernobyl nuclear accident took place in _______ year.
Answers
- Disasters.
- Geologic/Seismic
- Eight .
- Human-Induced .
- Air Pollutants .
- 1986.
III Match the following
List I Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â List II
Primary pollutant – Terrorism
Hazardous waste – Tsunami
Earthquake – Outdated drugs
Meteorological – Oxides of drought Sulphur
Human induced – Reduction in hazard rainfall
Answers
Primary pollutant – Oxides of Sulphur
Hazardous waste – Outdated drugs
Earthquake – Reduction in rainfall
Meteorological drought – Tsunami
Human induced hazard – Terrorism
IV Answer briefly
Define ‘hazard’.
Ans- Hazards are defined as a thing, person, event or factor that poses a threat to people, structures or economic assets and which may cause a disaster. They could be either human-made or naturally occurring in the environment.
What are the major types of hazards?
Ans – The major types of hazards include natural hazards (e.g., earthquakes, floods, cyclonic storms, droughts, landslides, tsunamis, and volcanic eruptions), human-made hazards (e.g., terrorism, pollution, industrial accidents), and socio-natural hazards [these are caused by the combined effect of natural forces and misdeeds of human.
