Questions
In a lake polluted with pesticides, which one of the following will contain the maximum amount of pesticides?
- Big fish
- Microscopic animals
- Small fish
- Water fowls
What is smog?
- Smoke + carbon dioxide
- Fog + carbon monoxide
- Fog + smoke
- Carbon dioxide + carbon monoxide
A natural phenomenon that becomes harmful due to pollution is
- greenhouse effect
- eutrophication
- desertification
- noise
What describes factors like moisture, oxygen, carbon dioxide, light and minerals that are needed by a plant for survival?
- Symbiotic relationships
- Biotic factors
- Carnivore-herbivore relationships
- Abiotic factors
What is the primary reason for targeting 'biodiversity hotspots' for conservation?
- They are the only areas where species are seriously threatened in the world.
- The number of species threatened far exceeds our capacity to protect them and we can, therefore, only concentrate on areas of highest species diversity.
- Protecting all areas of threatened species would not allow for new species to develop.
- They are areas where people do not live and conservation would, therefore, not be affecting the economic development of the area.
Which of the following is a biotic factor directly operating in an ecosystem?
- The carnivores
- Precipitation
- Biogas
- Climate
Which of the following is not a major greenhouse gas?
- Water vapour
- Methane
- Helium
- Carbon dioxide
What causes greenhouse effect?
- Trapping of CO2 and water vapour by the ozone layer
- Trapping of sun rays by the atmosphere
- Increase in percentage of CO2 and methane
- Trapping of sun rays by the ozone layer
Many scientists believe that greenhouse effect is predominantly the result of
- using chemical fertilizers to increase crop production
- testing nuclear weapons in violation of the Nuclear Test Ban Treaty
- using large amounts of gasoline, oil and coal in developed nations
- overgrazing on land
_______ of land surface is used for agriculture and grazing by the world's 6 billion people.
- A quarter
- One eighth
- Three quarters
- One third
Which of the following countries/regions is/are the largest source(s) of carbon dioxide emissions from the burning of fossil fuels?
- Developing nations
- Countries of the former U.S.S.R.
- Japan and China
- North America
Which of the following diseases is not caused by air pollution?
- Cough
- Common cold
- Asthma
- Wheezing
The amount of carbon dioxide in the atmosphere has increased in recent years. Environmentalists suggest this change is a direct result of
- overcutting of forests and the increased use of fossil fuels
- dumping of inorganic material into lakes and rivers
- improper storage of solid and nuclear waste
- use of herbicides and toxic substances such as asbestos and DDT
Which of these can possibly be causing the increase in temperatures being observed around the world?
- Increased solar activity
- Man-made pollution
- Both of these
- Neither of these
The percentage of carbon dioxide in the atmosphere is
- 0.03 to 0.04%
- 21%
- 2.45%
- 7.8%
Ozone gas absorbs
- violet radiation
- ultra-violet radiation
- infra-red radiation
- none of these
Which of the following organisms are totally dependent upon other animals for their food?
- Omnivores
- Producers
- Carnivores
- Herbivores
Rising global temperatures will lead to
- longer summers and drier winters
- higher water levels in lakes and streams and more consistent flooding patterns
- regional climatic changes and a rise in sea level
- low water levels in lakes and streams and larger floodplains
The percentage of oxygen in the atmosphere is
- 7.8%
- 0.03 to 0.04%
- 21%
- 2.45%
Which of the following is the mantra to help conserve water?
- Reduce, Reuse, Recycle
- Reduce, Reproduce, Reuse
- Renew, Recycle, Reduce
- Reuse, Renew, Reproduce
All of Earth's water, land, and atmosphere wherein life exists is called
- a community
- a population
- the biosphere
- a biome