Tag: protecting our environment

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Questions Related to protecting our environment

Multiple choice evs let's plant trees damaging the forests deforestation and afforestation protecting our environment pollution of soil degradation of land

What are the advantages of reforestation?

  1. It helps to reduce the concentration of CO$ _2$ in the environment.

  2. It has the potential to preserve endangered species.

  3. It can reverse the damage done by erosion.

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

Deforestation results in an increase in CO$ _2$ concentration in the atmosphere, greenhouse gasses like CO$ _2$ and methane significantly contribute to a changing climate. Reforestation involves the planting of the trees of same species. It is an effective method to reduce CO$ _2$ in the atmosphere, it also helps in restoring habitat loss and also helps in fighting against climate change and help in restoring endangered species from extinction.

Thus, the correct answer is option D.

Multiple choice evs - i the environment and us damaging the forests deforestation and afforestation protecting our environment pollution of soil degradation of land

An ecologist wants to study the impact of habitat fragmentation on a forest ecosystem. Which of these would be the least impactful way to study the potential effect of habitat fragmentation while giving the most useful information? 

  1. Using a computer model to generate possible outcomes

  2. Observing a fragmented prairie ecosystem

  3. Deforesting an ecosystem and observing the effects

  4. Hypothesizing about what might be possible outcomes of fragmentation

  5. Experirmenting on a small patch of trees in a controlled area
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Effects of habitat fragmentation on forest ecosystem can be best studied in small and isolated populations. Prairie is a kind of dog. Prairie ecosystem is highly fragmented and effects of habitat fragmentation can't be studies easily in such fragmented ecosystems.
So, the correct answer is 'Observing a fragmented prairie ecosystem'.
Multiple choice evs let's plant trees damaging the forests deforestation and afforestation protecting our environment pollution of soil degradation of land

Which of these is an example of an ecological intervention?

I. Toxic site remediation
II. Large-scale reforestation
III. Introduction of new species

  1. I only

  2. II only

  3. III only

  4. I and III only

  5. I, II and III
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation
Ecological intervention is use of conventional ways to deal with environment emergencies for its protection and conservation.
I. Toxic site remediation is the removal of contaminants and other polluting substances from the site.
II. Large scale reforestation is the plantation of trees for removing pollution from the atmosphere.
III. Introduction of new species to increase the biodiversity is also a conventional way of ecosystem conservation.
So, the correct answer is 'I, II and III'.
Multiple choice evs - i the environment and us damaging the forests deforestation and afforestation protecting our environment pollution of soil degradation of land

Concentration of green house gases is increasing due to

  1. Deforestation

  2. Increased use of refrigerators

  3. Increased combustion of coal and petroleum

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

The greenhouse gases are capable of trapping and reflecting the sun's radiations on the earth's surface. Examples include carbon dioxide, methane, nitrous oxides etc. These are naturally released by activities like volcanic eruptions, forest fires, respiration etc. But their increased levels have occurred due to the anthropogenic activities like deforestation, increased use of refrigerators (releasing CFCs) and increased combustion of coal and petroleum (releasing oxides of nitrogen, sulphur and carbon). Because of the increase in their levels, they have caused climate change by global warming.

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

Multiple choice evs - i the environment and us damaging the forests deforestation and afforestation protecting our environment

A successful forest conservation strategy should involve

  1. protection of animals at the highest trophic level

  2. protection of only sonsumers

  3. protection of only herbivores

  4. comprehensive programme to protect all the physical and biological components
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A successful conservation strategy must be holistic, protecting the entire ecosystem including all physical components (soil, water, climate) and biological components (flora and fauna) to maintain ecological balance.

Multiple choice evs - i rules are for everyone sustainability of natural resources adaptations - mangrove swamps, fast flowing rivers and treetops halophiles unequal distribution of resources protecting our environment meaning and type of resources

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 inexhaustible non-conventional resource. Its use is yet to pick up because of requirement of back up system to store and generate electricity during night and during cloudy days. There are three methods of harnessing solar energy- direct heating (e.g., solar cookers), thermoelectric conversion or solar thermal power plants, e.g., steam generation and photovoltaic conversion.

Multiple choice evs - i rules are for everyone sustainability of natural resources adaptations - mangrove swamps, fast flowing rivers and treetops halophiles unequal distribution of resources protecting our environment meaning and type of resources

Universal nonpolluting source of energy is

  1. Fossil fuel

  2. Sun

  3. Nucleus

  4. Wind and water
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Renewable source of energy include biomass energy and some forms of inexhaustible energy like solar energy, hydropower, wind power, tidal energy, wave energy, geothermal energy etc. 

Solar energy is universal, inexhaustible, non-conventional resource, which is non-polluting. It is considered universal because solar energy is available on all places and it does not leads to any type of pollution. However, it may not be harnessed easily. Green plants trap solar energy and convert it into chemical energy stored in sugars, which are utilised by all other organisms.

Multiple choice evs - i rules are for everyone sustainability of natural resources adaptations - mangrove swamps, fast flowing rivers and treetops halophiles unequal distribution of resources protecting our environment meaning and type of resources

Source of energy which does not evolve CO$ _{2}$ is

  1. Coal

  2. Oil

  3. Organic compounds

  4. Nuclear energy
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Coal and oil are fossil fuels been derived from dead bodies of plants and animals, which existed in past. Hence, they are carbon compounds and emit carbon dioxide on combustion. Organic compounds are obviously compounds of carbon and will evolve carbon dioxide on combustion. Nuclear energy is non conventional, non renewable resource. Nuclear fission (now fusion also) of selected radioactive materials yields large amount of heat energy. For example one amu of Uranium - 235 yields energy equal to burning of 15 metric tonnes of coal. The energy released in nuclear fission and fusion is not due to combustion process and hence, does not evolves carbon dioxide.

Multiple choice commercial studies striving for a better environment unequal distribution of resources protecting our environment rules are for everyone

Which of the following is the most appropriate definition of a natural resource?

  1. It is present only on land.

  2. It is a gift of nature, which is very useful to mankind.

  3. It is a man-made substance placed in nature.

  4. It is available only in the forest.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Natural resources occur naturally in our environment. They cannot be created by man.