Conservation Of Natural Resources - MCQ Test (22-11-2017) - Class 10 MCQ

Ozone layer is important because it prevents too many harmful ultra violet rays from reaching earth. Ultra violet rays have the capability to destroy plants and animals and can cause skin cancer, cataracts to human beings. Existence of life on earth is possible only because of the presence of ozone layer around the earth

Reusing your old things for a little longer can play a major role in reducing lot of waste in your surroundings

Afforestation is the natural or intentional restocking of existing forests and woodlands that have been depleted, usually through deforestation

A khadin, also called a dhora, is an ingenious construction designed to harvest surface runoff water for agriculture. Its main feature is a very long (100-300 m) earthen embankment built across the lower hill slopes lying below gravelly uplands. Sluices and spillways allow excess water to drain off. The khadin system is based on the principle of harvesting rainwater on farmland and subsequent use of this water-saturated land for crop production.
First designed by the Paliwal Brahmins of Jaisalmer, western Rajasthan in the 15th century, this system has great similarity with the irrigation methods of the people of Ur (present Iraq) around 4500 BC and later of the Nabateans in the Middle East. A similar system is also reported to have been practised 4,000 years ago in the Negev desert, and in southwestern Colorado 500 years ago.

The burning of fossils fuels produces lots of CO₂ that is one of the major green house gas. This has resulted in the increase in temperature on the earth called Global warming.

Amrita Devi sacrificed her life along with her three daughters  Asu, Ratni and Bhagu in year 1730 to save green trees being felled by the Maharaja of Jodhpur at a place known as Khejarli in Rajasthan. Along with her more than 363 other Bishnois, died saving the Khejri trees.

Silicosis is a lung disease caused by breathing in tiny bits of silica, a mineral that is part of sand, rock, and mineral ores such as quartz. It mostly affects workers exposed to silica dust in occupations such mining, glass manufacturing, and foundry work.

The katas, mundas and bandhas were the main irrigation sources in the ancient tribal kingdom of the Gonds (now in Orissa and Madhya Pradesh). Most of these katas were built by the village headmen known as gountias, who in turn, received the land from the Gond kings. Land here is classified into four groups on the basis of its topography: aat, (highland); mal (sloped land); berna (medium land); and bahal (low land).
A kata is constructed north to south, or east to west, of a village. A strong earthen embankment, curved at either end, is built across a drainage line to hold up an irregularly-shaped sheet of water. The undulations of the country usually determine its shape as that of a long isosceles triangle, of which the dam forms the base. It commands a valley, the bottom of which is the bahal land and the sides are the mal terrace.

'All of these ' option1 is correct because option  2.Pollen is found naturally in the air, human activities and choices can increase the amount of pollen in our air, and in turn, can cause people to have more severe allergic reactions.
Option 3. Volcanic eruptions release large quantities of greenhouse gases and other aerosols into the atmosphere which causes pollution
Option 4. The burning of fossil fuels to produce energy also releases significant amounts of carbon dioxide and other greenhouse gases into the environment

Statement1 is true because- Tendu patta (Diospyros melanoxylon) leaves are used for wrapping the tobacco and making " beedis " or Indian cigar
Statement 2 is false because Amrita Devi  and Bishnois sacrificed their life saving the Khejri trees.

The upflow anaerobic sludge blanket reactor (UASB) is a single tank process. Wastewater enters the reactor from the bottom, and flows upward. A suspended sludge blanket filters and treats the wastewater as the wastewater flows through it

Kuhls are water channels found in precipitous mountain areas. These channels carry water from glaciers to villages in the Spiti valley of Himachal Pradesh. Where the terrain is muddy, the kul is lined with rocks to keep it from becoming clogged. In the Jammu region too, similar irrigation systems called kuhls are found.

The evidence for the absence of oxygen in the early atmosphere comes from the fact that the early organisms were able to survive long enough and evolve into more viable forms (which were able to exist).
Then, how did we get oxygen in the atmosphere?
Early living organisms like blue-green algae could carry out the process of photosynthesis and release oxygen gas.

Kulhs are water channels found in precipitous mountain areas. These channels carry water from glaciers to villages in the Spiti valley of Himachal Pradesh

Disadvantages of construction of dams are:
Environmental problems:The construction of dams across rivers leads to deforestation, which results in the loss of biodiversity. This creates a disturbance in the natural ecosystem.
Social problems:The construction of dams involves the building of large reservoirs. In some cases, constructing a reservoir may result in the flooding of nearby towns and villages. A large number of people are displaced as a direct consequence of the construction of reservoirs. In such cases, the government rehabilitates the people of these areas, which in itself is a huge task.
Economic problems:The construction of dams requires huge amounts of monetary investments. A dam does not become profitable until it starts generating electricity.
As a result of all these problems, there is a strong opposition to the construction of large dams. The opposition to the construction of theTehri damover the river Ganga and theNarmada Bachao Andolan(a protest against the proposed increase in the height of the Sardar Sarovar Dam over the river Narmada) are examples of such opposition

Biosphere reserves, a particularly flexible form of protected area, is the centerpiece of UNESCO's Man and the Biosphere Program.
A biosphere reserve is a unique kind of protected area that differs from a national park, wilderness area, national forest, or wildlife refuge in having three very different, but equal, aims: conservation of genetic resources, species, and ecosystems; scientific research and monitoring; and promoting sustainable development in communities of the surrounding region. All three of these aims are equally important in a biosphere reserve.

Early organisms are known as cyanobacteria, or blue-green algae. These microbes conduct photosynthesis: using sunshine, water and carbon dioxide to produce carbohydrates and, yes, oxygen.
In fact, all the plants on Earth incorporate symbiotic cyanobacteria (known as chloroplasts) to do their photosynthesis of early days where no oxygen is present to this day.

All of the options are true.
Because the construction of this project is non-feasible due to the constant prolongation since the year 1947.
However, the amount of people benefited will outweigh the amount affected by it.

A neutral pH is most conducive for living beings in freshwater. The pH range 6.5-7.5 nearest to neutral.

There’s probably only one religion in the world that’s founded solely on the principle of conserving Nature. That’s the living religion of the Bishnois of Rajasthan. This religion is over 500 years old, and the followers are over 10 lakh. Imagine 10 lakh people for whom protection of all living things is a Way of Life.
This religion was founded by Lord Jambheshwar who is believed to be an incarnation of Lord Vishnu, the preserver of all that’s created on earth.

The Chipko Andolan - or the ‘Hug the Trees Movement’ was the result of a grassroot level effort of the local people to protect the forests. The movement originatedfrom an incident in a remote village called Reni in Garhwal in the Himalayas during the early 1970s. The local people hugged the tress and prevented the contractors from felling the trees.

Euro norms refer to the permissible emission levels, for both petrol and diesel vehicles, which have been implemented in Europe. However, the government in India has adopted the Euro norms for available fuel quality and the method of testing. It requires manufacturers to reduce the existing polluting emission levels in a more efficient manner by making certain technical changes in their vehicles.

Statement A is false because
The combining capacity of carbon monoxide with haemoglobin is more than 100 times faster than oxygen.
​Statement B is true is because Electrostatic precipitator, also called electrostatic air cleaner, is a device that uses an electric charge to remove certain impurities.

The tendu tree (Diospyros melanoxylon) is found widely across central India. Leaves plucked from its shrubs are used to wrap beedi, the poor man's cigarette.

None of the options are incorrect because of the below mentioned interpretation of each option.
In comparison to all other arable crops sugarcane requires high levels of water and also has one of the longest growing periods.
Most of the air pollution that is caused is due to soil erosion. The soil particles carried in the air lead to dust. The air might also contain chemicals from agricultural lands. This soil dust in the air often leads to respiratory problems and skin infections in humans causing environment pollution
Soil pollution allows emission of relatively large quantities of nitrogen via denitrification, volatilization of ammonia, and the decomposition of organic materials in the soil. As a result, this releases sulfur compounds and sulfur dioxides into the atmosphere, causing acid rain.

Chipko movement was started in 1970’s in the Himalayas of Uttar Pradesh in order to prevent the illegal deforestation and destruction of forest and trees. Indian villagers, mainly the women have participated in this movement. They adopted Gandhian method of Satyagraha by hugging the trees and saving them from being cut down.

Byssinosis, also called "brown lung disease" or "Mondayfever", is an occupational lung disease caused by exposure to cotton dust in inadequately ventilated working environments.

Petroleum is called liquid gold because of its high price and value and its economic need by all the countries worldwide.

Nandankanan Zoological Park is a 400-hectare (990-acre) zoo and botanical garden in Orissa, India. Established in 1960, it was opened to the public in 1979 and became the first zoo in India to join (WAZA) in 2009.

Wind energy is a clean fuel source.Wind energy doesn't pollute the air like power plants that rely on combustion of fossil fuels, such as coal or natural gas. Wind turbines don't produce atmospheric emissions that increase health problems like asthma or create acid rain or greenhouse gases. Therefore Wind energy to generate electricity can be termed as eco friendly.