Environmental Science Overview Quiz

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Questions and Answers

What is a key principle of environmental science?

  • Gibbs’ energy
  • Chemical kinetics
  • Sustainable development (correct)
  • Pressure and temperature interactions

Which aspect is NOT included in the structure and composition of the Earth?

  • Atmosphere
  • Hydrosphere
  • Lithosphere
  • Ecosystem dynamics (correct)

What process describes how energy and mass transfer across various environmental interfaces?

  • Chemical speciation
  • Thermodynamics (correct)
  • Biogeography
  • Ecological succession

What meteorological parameter refers to the rate of temperature change with altitude?

<p>Adiabatic lapse rate (D)</p>
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Which of the following best describes return on information from remote sensing?

<p>Digital image processing (D)</p>
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Which chemical concept is involved in the solubility of gases in water?

<p>Chemical equilibria (B)</p>
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Which aspect of environmental science deals with assessing natural resources?

<p>Biogeographic provinces (D)</p>
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What is the purpose of environmental education and awareness?

<p>To enhance understanding of climate change issues (D)</p>
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What is the main reason for the high pressure on natural resources in India?

<p>A large population living on a small land area (B)</p>
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Which of the following is NOT a soil health problem recognized by agricultural experts?

<p>Pollution from industrial waste (A)</p>
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What is emphasized as essential for developing countries to achieve?

<p>Environmentally sound and sustainable development (A)</p>
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Which classification of environment refers to external physical factors such as air and water?

<p>Physical Environment (D)</p>
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Which segment of Earth's environment consists of soil and rocks?

<p>Lithosphere (A)</p>
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What is considered crucial for the planning of development according to ecological sustainability?

<p>Synchronization of resource use with the ecological cycle (D)</p>
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What is the primary component that makes up the main mineral constituents of the soil?

<p>Carbonates (D)</p>
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Which environment includes all living organisms like plants, animals, and microorganisms?

<p>Biotic Environment (B)</p>
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What is the primary focus of environmental science?

<p>Application of scientific methods to environmental issues (A)</p>
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Which of the following is NOT a reason for the significance of environmental studies?

<p>Elimination of urban development (A)</p>
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How is environmental science different from ecology?

<p>Environmental science is interdisciplinary and includes various fields (D)</p>
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What has been a problematic trend in the development of rich countries?

<p>Transferring pollution-intensive industries to developing countries (D)</p>
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What term best describes the collective external conditions that impact the growth of organisms?

<p>Environmental conditions (A)</p>
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What is claimed to be a consequence of increased industrial growth?

<p>Decreased human life expectancy (B)</p>
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Which of the following environmental issues requires global cooperation to address?

<p>Marine pollution (B)</p>
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What is a major contributor to the complexity of environmental issues today?

<p>Growing human and animal populations (C)</p>
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What is the relationship between oxidation potential and reduction potential for an electrode?

<p>Oxidation potential is the negative of reduction potential. (B)</p>
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Which component contributes the least to the volume of healthy soil?

<p>Organic matter (A)</p>
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Which soil particle size is classified as sand?

<p>Between 0.1 and 2 mm (B)</p>
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What is the latent heat of sublimation?

<p>The heat required to change from solid to gas directly (C)</p>
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What is the primary function of humus in soil?

<p>To improve soil structure and supply nutrients. (D)</p>
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What is the approximate percentage of water in healthy soil?

<p>25% (D)</p>
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What is the term for the sum of evaporation and transpiration?

<p>Evapotranspiration (B)</p>
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Which statement about the hydrological cycle is true?

<p>It continuously recycles water on Earth. (A)</p>
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Which gas has the highest concentration in soil air compared to atmospheric air?

<p>Carbon dioxide (A)</p>
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What is the term for soil that contains no dominant particle size?

<p>Loam (C)</p>
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What is the residence time of water in the atmosphere?

<p>Several days (C)</p>
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What is meant by the water balance?

<p>The equation where changes in storage equal inflow minus outflow (C)</p>
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Optimal physical and chemical soil properties contribute to which of the following?

<p>Optimal soil biological properties (D)</p>
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During sublimation, how much energy is approximately required per gram?

<p>540 calories (B)</p>
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What is the significance of solar energy in the hydrological cycle?

<p>It sustains the circulation of water. (A)</p>
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Where is a significant amount of Earth's freshwater stored?

<p>In icecaps (D)</p>
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What is the primary role of the ozone layer?

<p>To absorb UV radiation from the sun (B)</p>
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Which of the following compounds is responsible for ozone depletion?

<p>Nitric Oxide (A)</p>
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What does the ozone depletion potential (ODP) indicate?

<p>The ratio of a chemical's impact on ozone relative to CFC-11 (C)</p>
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How do chlorofluorocarbons (CFCs) affect ozone in the stratosphere?

<p>They decompose to produce chlorine radicals that destroy ozone (B)</p>
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Which type of radiation increases due to ozone layer depletion?

<p>UV-B radiation (D)</p>
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Which of the following is NOT a consequence of increased UV-B radiation?

<p>Strengthened immune systems (D)</p>
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What distinguishes classical smog from photochemical smog?

<p>Photochemical smog occurs due to chemical reactions in sunlight (B)</p>
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Which of the following characteristics do hydrofluorocarbons (HCFCs) have?

<p>Low reactivity in the troposphere (A)</p>
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Flashcards

Environmental Science

The study of the interactions between living organisms and their physical environment, encompassing its chemical, physical, and biological components.

Lithosphere

Refers to the Earth's outermost layer, composed of rock, soil, and minerals.

Atmosphere

The gaseous layer surrounding the Earth, composed primarily of nitrogen and oxygen.

Hydrosphere

The entirety of Earth's water, including oceans, lakes, rivers, and groundwater.

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Biosphere

The sum of all living organisms on Earth and their interconnected environments.

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First Law of Thermodynamics

The total amount of energy in a system remains constant, but can change form.

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Second Law of Thermodynamics

The natural tendency is towards increasing disorder or randomness in a closed system.

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Sustainable Development

Meeting the needs of the present without compromising the ability of future generations to meet their own needs.

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Environment

A comprehensive field that examines the interactions between living organisms and their surroundings, including natural and human influences.

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Environment Studies

A study that highlights the importance of protecting and conserving our planet, emphasizing the negative impact of human activities.

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Global Environmental Issues

Issues like global warming, ozone layer depletion, and biodiversity loss affect the entire world, requiring international cooperation to address them.

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Development and Environment

The interconnectedness of economic progress and its impact on the environment, often leading to trade-offs between development and environmental protection.

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Shifting Industries to Developing Countries

The movement of industries from developed to developing countries, often contributing to environmental problems in the latter.

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Historical Environmental Impacts of Developed Nations

Developed nations' historical disregard for environmental impacts, leading to current global environmental issues.

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Environmental Issues

A collective term for the various issues affecting the environment, such as pollution, climate change, resource depletion, and biodiversity loss.

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What is the lithosphere?

The Earth's outermost layer, composed of soil and rocks, forms the basis for life on Earth. It's a mix of inorganic materials like minerals and organic matter from decaying organisms.

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Soil health problems

Soil that is rich in nutrients and organic matter is healthy and supports robust plant growth. However, factors like depletion of nutrients and excessive salt can harm soil health.

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Population pressure on resources

The world's population is increasing, while resources like land are limited. This creates pressure on the environment, leading to issues like soil degradation.

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Alternative paths to development

For sustainable growth, we need to find new ways to develop without harming the environment. This means balancing economic progress with environmental protection.

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Wise planning for development

To survive and thrive, we need to carefully manage our use of natural resources. This means using them wisely without depleting them for future generations.

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What is the physical environment?

The physical environment includes non-living components like air, water, and soil. It provides the basic necessities for life.

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What is the living environment?

The living environment encompasses all living organisms, including plants, animals, and microorganisms. They interact with each other and the physical environment.

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Segments of Earth's environment

Earth's environment can be divided into four sections: lithosphere (land), hydrosphere (water), atmosphere (air), and biosphere (life). Each section plays a crucial role in maintaining life on Earth.

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What is Ozone?

Ozone is a gas found in the stratosphere that absorbs harmful ultraviolet (UV) radiation from the sun, protecting life on Earth.

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What are CFCs?

Chlorofluorocarbons (CFCs) are chemicals that were widely used in refrigerants and aerosols. They break down ozone in the stratosphere leading to ozone depletion.

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What is ODP?

Ozone Depletion Potential (ODP) measures a chemical's impact on the ozone layer compared to CFC-11. Chemicals with a higher ODP damage ozone more.

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What are HCFCs?

Hydrofluorocarbons (HCFCs) are substitutes for CFCs because they don't contain chlorine and have a zero ODP. They are considered more environmentally friendly.

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What is Photochemical Smog?

Photochemical smog is a type of air pollution formed when sunlight reacts with pollutants like nitrogen oxides and volatile organic compounds.

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What is Classical Smog?

Classical smog is a type of air pollution formed mainly from burning coal, producing sulfur dioxide and particulate matter.

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What are the effects of ozone depletion?

Ozone depletion leads to an increase in harmful UV-B radiation reaching the Earth. This can cause skin cancer, cataracts, and damage to ecosystems.

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What is smog?

Smog is a type of air pollution that reduces visibility and can harm human health. It can occur in two main forms: classical smog and photochemical smog.

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Reduction potential

The potential that indicates the tendency of an element to gain electrons and get reduced. It is the reverse of oxidation potential, with the sign changed.

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Oxidation potential

Measures an element's tendency to lose electrons, becoming oxidized. This is the opposite of reduction potential.

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Inorganic mineral matter in soil

A major component of soil, typically comprising 40-45% of its volume, consisting of broken-down rocks and minerals.

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Organic matter in soil (humus)

A crucial part of soil, about 5% of its volume, formed from decomposed plant and animal matter. It improves soil structure and provides nutrients.

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Water in soil

A vital soil component making up about 25% of its volume, essential for plant growth and various soil processes.

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Air in soil

Another essential soil component, comprising about 25% of its volume, crucial for root respiration and other biological activities.

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Sand in soil

Soil particles with diameters between 0.1 and 2 mm. They feel gritty and are relatively large.

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Silt in soil

Soil particles with diameters between 0.002 and 0.1 mm. They feel smooth and are smaller than sand.

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Latent Heat of Sublimation

The amount of heat energy required to change a substance from a solid directly to a gaseous state, without passing through a liquid phase, at a constant temperature.

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Hydrologic Cycle

The continuous movement of water on, above, and below the surface of the Earth.

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Evaporation

The process of water changing from a liquid to a gas, often occurring at temperatures below the boiling point.

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Condensation

The process of water vapor changing back into liquid water, releasing heat energy.

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Evapotranspiration

The combined process of evaporation and transpiration, where water vapor enters the atmosphere from both bodies of water and plant leaves.

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Residence Time

The amount of time a water molecule spends in a particular storage compartment, such as the atmosphere, rivers, or oceans.

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Hydrologic Balance

The balance between the inflow and outflow of water in a given area, where changes in storage must equal the difference between the two.

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Water Storage

Places where water is temporarily stored, including ice caps, soil, groundwater, oceans, and other bodies of water.

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Study Notes

  • This document appears to be study material for the UGC NET and JRF exam in Environmental Science.
  • It covers a wide range of topics related to environmental science.
  • The material is compiled by Senthamil Elasi on November 4, 2023.
  • The study material covers topics from the syllabus of the UGC NET JRF in Environmental Science. The document's structure appears to be well-organized, with each chapter likely addressing specific topic areas from the syllabus.

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