Energy conservation and sources - class-X
Description: energy conservation and sources | |
Number of Questions: 31 | |
Created by: Akash Patil | |
Tags: natural resources and their conservation natural resources sources of water biology evs practices for conservation of resources commercial applications |
If water pollution continues at its present rate, it will eventually
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Prevent precipitation
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Stop the water cycle
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Make oxygen molecules unavailable to aquatic life
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Make nitrates unavailable to aquatic life
Water pollution is the condition in which there is an increase in the concentration of the undesirable compounds in the water resources. The pollutants are the organic compounds. The microbes use up the oxygen which is present in the water bodies for the degradation of the organic matter in the pollutants. This lowers the amount of oxygen which is available for the aquatic plants and animals.
Which of the following are the ways of conserving and preserving the earth's natural resources?
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Recycling wastes
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Using alternative energy sources
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Reducing the wastage of non-renewable natural resources
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All of these
Preservation refers to the measures taken to keep living things in their original balanced state. Conservation refers to the careful and systematic use of natural resources without causing harm and death to living organisms in the environment. Recycling of waste, reducing the use of non-renewable natural resources and alternative source are the measures to maintain the natural resources without harming the resources and environment. Thus, the correct answer is option D.
The management of natural resources should take into
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A long term perspective
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Environmental pollution
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Their equitable distribution
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A, B, C and safe disposal of wastes
Natural resource management refers to the management of natural resources such as land, water, soil, plants and animals, with a particular focus on how management affects the quality of life for both present and future generations. This includes all the above a,b & c points hence d option is the right answer.
Biogas generation is mainly based on the principle of
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Fermentation
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Degradation
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Putrification
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Both A and B
Biogas is a flammable gas that is produced from the fermentation or degradation of biomass in biogas plants. Biogas typically refers to a gas produced by the biological breakdown (degradation) of organic matter in the absence of oxygen. whereas the breakdown of organic matter, usually by bacterial action, resulting in the formation of other substances of less complex constitution with the evolution of ammonia is known as putrification.
The use of CFL can save .......... electricity per year.
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1000 megawatt
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6000 megawatts
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100 megawatt
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None of the above
Compact fluorescent lamps (CFL) are the bulbs which are generally used to save the electricity. These bulbs use and convert only 1/5$^{th}$ of the electricity into light. There is consumption of less electricity. This helps in reduction of about 6000 megawatts of electricity per year.
Which one of the following is an example of non-renewable resources?
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Water
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Wind
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Vegetation
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Coal and minerals
Nonrenewable resources are resources that are not easily replenished by the environment. Thus coal and minerals are examples of non renewable resources.
Which of the following energy is better than solar energy?
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Atomic energy
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Wind energy
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Energy from fossil fuel
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None of the above
De-dust lighting fixture is used
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To maintain illumination
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To increase energy efficiency
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To remove dust from bulb
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None of the above
Which of the following has the largest wind energy farm in India?
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Karnataka
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Madhya Pradesh
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Tamilnadu
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Kerala
India is ranked 5th largest wind producing country in the world. The largest wind energy farm is in Muppandal, Tamilnadu having the capacity of 1500MW wind production. So, the correct option is C.
CFL is
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Chlorofluoro lamp
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Compact fluorescent lamp
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Compact fluorescent light
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Both B and C
CFL is compact fluorescent light. Compact fluorescent light bulbs are used in place of incandescent bulb because they use about 1/7$^{th}$ of the power used by the incandescent bulb. Hence, they are highly efficient in saving electricity.
Energy source which do not evolve CO$ _2$ is
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Oil
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Coke
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Nuclear energy
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Other organic substances
Oil is a mixture of molecules that mainly contain carbon and hydrogen. When it burns it also produces CO$ _2$, but 25% less than coal for the same amount of energy (because the combustion of hydrogen gives energy but generates only water).
Which of the following is the best choice for energy production?
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Hydrogen
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Solar system
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Windmill
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All of the above
Energy generated by using wind, hydrogen, tides, solar, geothermal heat, and biomass is known as non-conventional energy. These are the inexhaustible non-conventional resource. Hence, these are the best choice for energy production.
The economically friendly measure to conserve solar energy is
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Sugarcane plantation
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Energy plantation
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Both (A) and (B)
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None of the above
Photosynthesis is the process by which green plants and certain other organisms transform light energy into chemical energy. Photosynthesis in green plants harnesses the energy of sunlight to convert carbon dioxide, water, and minerals into organic compounds and gaseous oxygen. Hence, planting green trees is an easy way to conserve solar energy.
Amazon rainforests are considered as 'lungs of the planet' as they contribute ________ of the total oxygen in the earth's atmosphere.
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10%
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15%
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20%
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30%
About 20% of the world oxygen is produced in the rainforests. amazon They are described as the 'lungs of the planet' because they provide the essential world environmental service of continuously recycling $CO _$ into $O _2$.
Ecofriendly method is
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Plantation of $C _3$ plants
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Plantation of Sugarcane
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Energy plantation
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None of the above
- Energy plantation is the practice of planting trees, purely for their use as fuel. Terrestrial biomass i.e., the wood plants have been used for a long time to generate fire for cooking and other purposes.
- Energy plantation is an Eco-friendly method or environmental friendly as this method does not cause any harm to the environment.
- Hence the Eco-friendly method is Energy plantation.
- So, the correct answer is 'Energy plantation'.
Select the eco-friendly activity among the following.
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Using car for transportation.
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Using polybags for shopping.
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Using dyes for colouring clothes.
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Using windmills to generate power for irrigation.
Which of the following activities that you perform daily in which natural resources can be conserved or energy utilisation can be minimised?
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Use fan and light only when required.
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Unused water in the water bottle may be used for watering plant.
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Use solar water heating devices.
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All of the above.
What measures would you take to conserve electricity in your house?
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Use of fluorescent tubes or CFL.
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Put off the fans and lights when they are not required.
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Maximum use of solar radiation and use of solar water heating system during winters.
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All of the above.
Which of the following activities in daily life are eco-friendly?
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Separation of biodegradable and non-biodegradable substances
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Gardening
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Use of gunny bags/paper bags in place of polythene/plastic bags
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All of the above
Eco-friendly activities in daily life:
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Separation of biodegradable and non-biodegradable substances.
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Gardening
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Use of gunny bags/paper bags in place of polythene/plastic bags.
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Using public transport for commuting, walking or using cycle for short distances.
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Harvesting rainwater.
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Switching off light/ fans in unoccupied rooms.
- Use of compost and vermicompost in place of fertilizers.
Leader of "Narmada Bachao Andolan"
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Vandana Siva
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Medha Patkar
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Menaka Gandhi
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Mayilamma
Index of energy consumption is maximum for
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U.S.A
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Japan
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Norway
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Canada
How much radiant energy will an object emit if its temperature is at absolute zero?
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The maximum theoretical amount
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None
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The same as it would at any other temperature
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Depends on the chemical composition of the object
Match the following.
(i) Oil reserve lasts for | (a) $252$ years |
---|---|
(ii) Gas reserves lasts for | (b) $45$ years |
(iii) Coal reserves lasts for | (c) $72$ years |
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i-b, ii-c, iii-a
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i-c, ii-b, iii-a
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i-a, ii-b, iii-c
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i-a, ii-c, iii-b
Method of managing used envelope: Reuse: : Method of managing fuels.
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Recycling
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Use for repurpose
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Reduce the use
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Refuse the use
Per capita daily consumption of energy is lowest in
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USA
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UK
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India
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Russia
To meet energy crisis what other sources can be exploited?
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Wind
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Water
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Nuclear
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All of the above
The wind, water, and nuclear energy are renewable forms of energy resources. These reserves once consumed can be replenished again. When there is an energy crisis, due to the reduction in the number of energy reserves, there will be an increase in the use of renewable resources. These energy resources can be exploited for the production of energy when there are no other resources available.
Greatest problem in the water conservation is to reduce the amount of
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Ground water
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Precipitation
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Evaporation
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Run off water
Evaporation from water reservoirs in hot arid climates causes a loss of 10 vertical feet a year. This water loss can be controlled by construction of reservoirs with greater water depth and concentration of water into single reservoir. Also wind blowing across the surface of water reservoir causes additional evaporation. A windbreak helps to conserve water. Thus the correct answer is option C.
The best way to conserve energy is
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Install exhaust fan at a high elevation
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Use of fluorescent bulbs
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Turn off light when not in use
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All of the above
Conservation of energy is of great concern nowadays. Light is also a form of energy which should not be wasted. The best way to conserve the light energy are as follows.
Identify the energy saving light bulb.
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Incandescent bulb
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Compact fluorescent light bulb
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Light emitting diode bulb
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Both B and C
CFL (Compact fluorescent light bulbs) and LED (Light emitting diode bulb) are used in place of incandescent bulb because they use about 1/7$^{th}$ of the power used by the incandescent bulb. Hence, they are highly efficient in saving electricity.
Solar energy is the .......... source of energy.
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Conventional
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Non conventional
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Man made
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None of the above
Energy generated by using wind, tides, solar, geothermal heat, and biomass is known as non-conventional energy. Solar energy is an inexhaustible non-conventional resource. There are three methods of harnessing solar energy- direct heating (e.g., solar cookers), thermoelectric conversion or solar thermal power plants, for example, steam generation and photovoltaic conversion.
Switch on the power when TV is not in use leads to the energy loss of
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5 watts
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10 watts
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1 watts
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50 watts
The energy management is very important for the conservation of energy. It involves monitoring the consumption of energy, finding ways to save (control) energy and taking initiatives to conserve energy by replacing the inefficient equipments and controlling routine waste. The power should not be switched on when TV and any other audio or video device is not in use for a long time. It is because even in the switch off condition energy is consumed by the electric appliances and this is called standby power. 10 watts of energy is consumed by the TV even if, the power is on but TV is not in use. So, the correct option is B.