Monday, April 09, 2018

AHSEC Class 11: Environmental Education Solved Question Papers' 2017

Full Marks: 40
Time: 1 ½ hours
The figures in the margin indicate full marks for the questions

1. Write very short answer of the following questions:                                                 1x10=10
a) Name two minor components of atmosphere.
Ans: The major atmospheric gases are nitrogen and oxygen. The atmosphere also contains minor amounts of other gases, including carbon dioxide, methanenitrous oxide, and ozone.

b) What is a food chain in an ecosystem?
Ans: In an ecosystem, the sequential chain of eating and being eaten is called a food chain. Grasses – cattle – tiger (the chain consists of three links)

c) Name two natural sources of air pollution.
Ans. Major Natural Sources of air pollution are as follows:
a.       Forest fires: Very large quantities of smoke and particulate matter are liberated during their breakout.
b.      Decomposition of organic and inorganic substances: Methane gas, carbon dioxide are released into the air.
c.       Dust: Dust is always present in the atmosphere in varying amount.

d) Name two radioactive pollutants.
Ans: Alpha particlesbeta particles, and gamma rays are the most commonly encountered forms of radioactive pollution. 

e) Name the causal organism of typhoid.
Ans: The cause is the bacterium Salmonella Typhi, also known as Salmonella enterica serotype Typhi, growing in the intestines and blood. Typhoid is spread by eating or drinking food or water contaminated with the feces of an infected person.

f) Mention an instance of man-made worst disaster in Assam.
Ans: The landslide in the recent years was primarily man induced,

g) Write the full form of NDRF.
Ans: National Disaster Response Force (NDRF)

h) Since when was the ‘National Road Safety Policy’ adopted in India?
Ans: 15 – 03 - 2010

h) What does amber light in a traffic signal mean?
Ans: An amber light means that you must not go beyond the stop line or, if there is no stop line, beyond the light.

i) What is zebra crossing?
Ans: A zebra crossing is a place on the road that is marked with black and white stripes, where vehicles are supposed to stop so that people can walk across.

2. Write short answer of the following questions (any ten):                       2x10=20
a) Write a brief note on hydrosphere.
Ans: The hydrosphere is the combined mass of water found on, under, and above the surface of a planet, minor planet or natural satellite. It has been estimated that there are 1386 million cubic kilometers of water on Earth. 
b) Mention the characteristics of artificial ecosystem.
Ans: a) Artificial ecosystems depend on natural cosmic laws. b) Diversity will be lesser compared to natural systems. Unfavourable and less favoured species are likely to taper off slowly.
c) Mention two conservation strategies of our country.
Ans: Indian has several Acts in force which have a bearing on the conservation of biodiversity. Some of these Acts are:
a.       Environment Protection Act, 1986: This act relates to general measures to protection the environment, such as restriction on industrial and other processes or activities in specified areas.
b.      Forest (Conservation) Act, 1980: This act primarily focuses on prohibiting or regulating non forest use of forest lands.
d) State the non-commercial services offered by green plants.
Ans: a) Plantation of Roads b) Plantation  of Schools and Hospitals etc.
e) What measures can be taken to keep drinking water sources clean and safe?
Ans: Measures to keep drinking water safe
a.       Test your water.
b.      Read your utility's water quality report.
c.       Filter your water.
d.      Keep your home's plumbing updated.
e.      Don't poison the well or reservoir.
f.        Drink boiled or bottled water.
f) Write two probable effects of noise pollution on human health.
Ans: a) Hearing Problems: Exposure to noise can damage one of the most vital organs of the body, the ear. 
b) Poor Cognitive Function: With regular exposure to loud noise, the ability to read, learn and understand decreases significantly over time. 
g) Suggest any four steps which you can take as a student in Disaster Management.
Ans: Students are obligatory and highly sensitive part of the society. Today’s students are tomorrows citizen. So students can play a vital role in disaster management. Like:
a.       During earthquake, one should take shelter under the hard frames of the doors, corner of the house, strong table/beds or in open spaces.
b.      One should never take shelter under electric wire/posts, tall trees, water tanks, windows or furniture with glasses, kitchen, bathrooms.
c.       The Almirah, rack and furniture in the bedrooms or living rooms should be fixed properly.
d.      A bag containing of emergency items like drinking water, foods, first aids, whistle, torch lights should be kept near the main entrance of the house for use in an emergency situation.
e.      Precautionary and prohibitory measures imposed by the administration in such situations should strictly be followed.
h) What ‘Not to Do’ during disaster?
Ans: Not to do during disaster
a.       Don’t press the panic button unnecessarily.
b.      Rescue operation should not be carried out without proper assessment and equipments.
c.       Materials from the damage site should not be taken out in a haphazard manner to evade further damage.
d.      No careless movement around the accident site be made, which may further endanger the lives of the victims.
e.      If not emergent, no movement around/over the accident site should be done.
i) Mention about the measures to be taken before and after a disaster.
Ans: Steps for Disaster Management can be taken in three stages:
a.       Before the Disaster (Precautions, Mass Awareness, Prediction, Preparation, etc.)
b.      During the occurrence of Disasters (Special steps to be taken as per type of the disaster, search and rescue operation, etc.)
c.       After the Disaster (Relief and Rehabilitation of the affected, heath services, reconstruction of communication systems, etc.)
j) Write the safety rules to be obeyed, while walking on the road.
Ans: Safety rules while walking on the road:
a.       Use zebra crossing while crossing a road.
b.      While crossing road – look left then right then again left.
k) What is meant by mandatory road signs? Name any four of the signs that fall under this category.
Ans: According in India, uniform road signs are incorporated in Motor Vehicles Act, 1988. These Road signs are classified into three and these are:
a.       Mandatory Road signs.
b.      Cautionary Road signs.
c.       Informatory Road signs.
Mandatory Road signs: These signs are used to ensure free movement of traffic and make the road users cognisant of certain laws and regulations, restrictions and prohibitions. Violation of these signs is an offence, as per law.

l) What is the purpose of wearing a seat belt in a vehicle?
Ans: Seat belts are designed to retain people in their seats, and so prevent or reduce injuries suffered in a crash. They ensure that as little contact is made between the occupant and vehicle interior as possible and significantly reduce the risk of being thrown from a vehicle.
m) Why should helmet be worn by the biker and the rider?
Ans:  The head and brain is most vulnerable to injury in a motorcycle accident. Bikers and riders wearing helmets increase their chance of survival significantly over non-helmet wearers. Bikers and Riders who do not wear helmets are at risk of suffering a traumatic brain injury if they are in an accident. Without protection, the head is vulnerable to a traumatic impact in an accident even when traveling at low speeds
3. Answer any two of the following questions:                                  5x2=10
1. Write an account on need for environmental awareness.
Ans: The world today is confronted with the great problem of environmental degradation and pollution. Different types of pollution, fast depleting forest resources, rapid population explosion, expanding industrialization, unplanned urbanization, mining, soil erosion etc have created ecological imbalances in recent years. Man’s quest for economic development has been mainly responsible for the ruthless exploitation of natural resources. Moreover highly materialistic, greedy and luxurious life style attitude of human race indiscriminately exploited or imprudently destroyed the natural resources. All these activities have become a threat to the very existence of a number of living organisms. So creation of public awareness is must to protect the environment from further deterioration.
2. What is energy conservation? What measures will you adopt for energy conservation?
Ans: The following measures for energy conservation can be adopted in initial steps:
a.       More technological innovation contributing efficient energy saving.
b.      Unnecessary use of electricity should be prohibited.
c.       Switch off the street lights early in the morning.
d.      Domestic consumers can curtail energy consumption on many household goods.
e.      Industries should develop a mechanism for judicious use of raw materials for their energy needs.
3. What are the purposes and functions of ‘Assam State Disaster Management Authority’ (ASDMA)?
Ans: Assam State Disaster Management Authority (ASDMA): The State of Assam has taken special steps to address disasters under the National Disaster Management Act, 2005. The Guidelines of the Assam State Disaster Management Authority was framed in the year 2010. The main functions of these agencies are:
a.       Planning.
b.      Preparedness.
c.       Operation.
d.      Coordination.
e.      Community participation.
4. What is a Driving Licence? Explain the rules for eligibility to have a driving licence.
Ans: Driving licence is a licence issued by a competent authority authorizing the person to drive a specified class of vehicle.
Eligibility for Getting a Driving License:
a.       The conditions to be fulfilled u to become an eligible for driver  in India
b.      Applicant must be at least 18 years or above to apply for your permanent license and be able to lawfully drive a private motor vehicle.
c.       Applicant must first acquire a valid learner’s license.
d.      Applicant must submit the application form after a minimum period of 30 days and within 180 days of the date of the issuance of his learner’s license.
e.      If the applicant is a minimum age of 20 years old and already possess your Learner’s License, he could even apply for commercial vehicle license.
f.        All applicants must be up to date with the traffic laws and regulations.