Tag: rules are for everyone

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Multiple choice commercial applications management of natural resources unequal distribution of resources protecting our environment rules are for everyone

Common energy source in villages is

  1. Electricity

  2. Coal

  3. Biogas

  4. Wood and animal dung
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Energy is the most important constituents of the living part of the human being.
Now we can generate energy in different ways like hydropower, wind energy, biogas, and many more but today also in villages the trend is being used for producing energy by using wood and animal dung.
So, the correct answer is 'Wood and animal dung'
Multiple choice commercial applications management of natural resources unequal distribution of resources protecting our environment rules are for everyone

An inexhaustible non-conventional universal source of energy is

  1. Wind energy

  2. Solar energy

  3. Hydrothermal energy

  4. Tidal energy
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Solar energy is considered to be the non-conventional because it is not derived from the conventional fossil fuels. It is inexhaustible as it will not be used up completely. It will not take much time in regeneration. It is universal as most of the places on earth that sustain a large population get the sunlight. Wind energy is also non-conventional and inexhaustible but it is not available to every area. It can be harnessed in areas that witness a low pressure, like equatorial and tropical areas. Similarly, the tidal energy is available to the coastal areas. Hydrothermal resources are available everywhere but need a heavy economic investment for their usage.

Hence, the correct answer is 'Solar energy'.

Multiple choice commercial applications management of natural resources unequal distribution of resources protecting our environment rules are for everyone

Photovoltaic cells are semiconductors of

  1. Silicon

  2. Gallium arsinide

  3. Cadmium telluride

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Photovoltaic cells are used in trapping solar energy. These are made of semiconductors that can lose the electrons when exposed to the sunlight to generate the electric current. The semiconductor material used can be silicon, gallium arsenide, cadmium telluride. Silicon is the most preferred because of its uniform crystalline structure. Cadmium Telluride provides a low-cost alternative that is also highly absorptive of solar energy. Gallium arsenide is used for its resistance to the harmful effects of the radiations. It is generally used for space photovoltaic cells.

Hence, the correct answer is 'All of the above'

Multiple choice commercial applications management of natural resources unequal distribution of resources protecting our environment rules are for everyone

Solar energy can be trapped through

  1. Direct heating

  2. Thermoelectric conversion

  3. Photovoltaic conversion

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Solar energy can be trapped through the following:

A. Direct heating of the solar energy uses pumps and fans to circulate the heat gathered by the solar collectors. It is widely used in water heating system.
B. Thermoelectric conversion converts the solar energy directly to the electrical energy by creating a voltage effect due to the difference in the temperature.
C. Photovoltaic conversion produces electricity through solar energy by maintaining an electron flow. The release of electrons when exposed to sunlight creates an electric current along the path of the electron movement.
Hence, the correct answer is 'All of the above'

Multiple choice commercial applications management of natural resources unequal distribution of resources protecting our environment rules are for everyone

The interior of a cow-dung pile kept for a few days is quite warm. This is mostly because

  1. Cellulose present in the dung is a good insulator .

  2. Bacterial metabolism inside the dung releases heat.

  3. Undigested material releases heat due to oxidation by air.

  4. Dung is dark and absorbs a lot of heat.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

At the later stages of decomposition of cowdung, mesophilic micro-organisms decompose the dung, generating heat from exothermic( process which produces heat) processes; such heat generation is associated with the well known phenomenon of the elevated temperature of composting.

Multiple choice evs - i rules are for everyone natural resources and their types promotion of renewable resources protecting our environment sustainability of natural resources adaptations - mangrove swamps, fast flowing rivers and treetops halophiles

Which of the following is non-renewable resource?

  1. Forest

  2. Coal deposit

  3. Water

  4. Wild life
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Fossil fuels are nonrenewable conventional energy resources found inside the earth's crust where they have been formed through heat and compression on forests and other organic matter buried underneath due to earthquakes, landslides, lava etc. Fossil fuels can be solid, e.g., coal; liquid, e.g., petroleum; or gaseous, e.g., natural gas.

Multiple choice evs - i rules are for everyone natural resources and their types promotion of renewable resources protecting our environment sustainability of natural resources adaptations - mangrove swamps, fast flowing rivers and treetops halophiles

Non-renewable source is

  1. Water and gas

  2. Plant and coke

  3. Coal and mineral substances

  4. Energy and water
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Inexhaustible resource is a natural resource, which is found in such abundance, that it is unlikely to diminish or get exhausted. E.g., air, solar energy, wind power, rainfall etc.
Exhaustible resource is a natural resource, which is likely to diminish and get exhausted due to continuous use or exploitation. E.g., minerals, fossil fuels, forests etc. Exhaustible resources are of two types renewable and non-renewable.
Renewable exhaustible resource is a natural resource, which gets replenished, recycled or reproduced. E.g., forests, water, agriculture etc.
Non-Renewable exhaustible resource is a natural resource, which is likely to get exhausted with use. E.g., fossil fuels like petroleum, minerals and metals, Coal.