CBSE Class 9 Science OTBA Environment Development From Hills assignment

CBSE Class 9 Science OTBA Environment Development From Hills. Students are advised to refer to the attached assignments and practise them regularly. This will help them to identify their weak areas and will help them to score better in examination. Parents should download and give the assignments to their children for practice.

Que: Give the reason for the enhancement of quality of man’s living

Ans: Enhancement of quality of living in man’s life is due to his ability and power to transform his environment through technological developments

Que: What was the highest rainfall that was recorded in Uttarakhand till 2012.What was the rainfall recorded on 16th a nd 17th June 2013 within a period of 24 hours

Ans: The highest rainfall recorded till 2012 was 350.5mm in 1970.The rainfall recorded on 16th and 17th within a span of 24 hours was 370 mm.

Que: What is the average monthly rainfall during the months of June , July and August

Ans: In the month of June average monthly rainfall is 210mm while in July and August it is more than 600mm.

Que: What is the highest ever single day rainfall in June for the state of Uttarakhand

Ans: It is 370mm.

Que: Name a disaster caused by natural reasons?

Ans: Tsunami , Earth quake etc.

Que: Name a disaster caused by manmade reasons?

Ans: Bomb blast, Terrorism

Que: Name a device used for collecting and measuring the amount of rain which falls.

Ans: Rain gauge

Que: What do you mean by eco-friendly tourism?

Ans: Tourism without upsetting the existing balance in nature at a place is called eco –friendly tourism.

Que: Who is an Ecologist?

Ans: A biologist who studies the relation between organisms and their environment is an ecologist.

Que: What is meant by Disaster Management ?

Ans: ‘Disaster management can be defined as the organization and management of resources and responsibilities for dealing with all humanitarian aspects of emergencies, in particular preparedness, response and recovery in order to lessen the impact of disasters.1’

Que: What is the place of Uttarakhand on the Tourism map among all states.

Ans: Uttarakhand ranks eighth on the Tourism Map.

Que: What is meant by cloudburst?

Ans: The cloudburst is a localized weather phenomena representing highly concentrated rainfall over a small area lasting for few hours.

Que: What is meant by landslide?

Ans: A large mass of rocks and earth that suddenly and quickly moves down the side of a mountain or hill

Que: To what percentage the tourists are increased from 2001 to 2012 in KEDARNATH

Ans: 378%

Que: Name the place in Uttarakhand where you can find more number of Hydel power Projects

Ans: PITHORAGARH where 62 number of hydel projects are constructed.

Que: What is meant by Quarrying?

Ans: The extraction of building stone or slate or rock from the ground

Que: What is the unit of rainfall?

Ans: mm ie millimeters of rain because the rainwater is collected in a container kept in an open place for 24 hours and the height of the rainwater is noted in mm

Que: How is the record of rainfall maintained?

Ans: The record of rainfall is maintained on a daily basis by the meteorological department in the place. Generally the rainfall received over a year is reported to-- classify the place as one which receives torrential rains or average or scanty rainfall.

Que: When is a place said to have torrential rains?

Ans: A place which receives above 3000mm of rain per year is said to have torrential rains. Eg Cherapunji, western coast of India—particularly Karnataka and Kerala

Que: Do landslides occur in all hills?

Ans: The Mountains of the Himalayas and the Western Ghats are young mountains and hence the soil has not hardened enough. Hence the chances of occurrence of landslides are more.

Que: Why do landslides occur?

Ans: One of the reasons could be--The anthropogenic activities (Man Made activities) like cutting the hills to make roads and houses have lead to keeping the cut edges of the hill without support. Hence the landslide when there is a heavy rain. Such landslides can be reduced by constructing a retaining wall along the walls of the roads etc.

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