Environmental Science Overview Quiz

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Questions and Answers

Which of these best describes the focus of the 'Ecological Perspective'?

  • The relationships between organisms and their environment. (correct)
  • The specific impact of human activity on natural resources.
  • The study of individual plant and animal behavior within an ecosystem.
  • The use of mathematical models to predict population size.

In the logistic growth model, what happens to a population as it approaches its carrying capacity?

  • The rate of population growth slows down. (correct)
  • The population size decreases rapidly due to resource depletion.
  • The population's death rate drops to zero.
  • The rate of growth accelerates exponentially.

How do density-independent factors impact a population?

  • They decrease as the population grows.
  • Impact is not influenced by the population's size. (correct)
  • Impact depends on the size of the population.
  • They cause the population to stabilize at carrying capacity.

What is a key characteristic of a metapopulation?

<p>A group of spatially separated populations of the same species that interact. (D)</p> Signup and view all the answers

Which factor is most directly related to the concept of 'infant mortality' in environmental studies?

<p>The rate of deaths of children under the age of one year. (D)</p> Signup and view all the answers

Which of the following best describes the primary focus of environmental science?

<p>The study of human impacts on the environment and sustainable management strategies. (A)</p> Signup and view all the answers

What does the interdisciplinary nature of environmental science imply?

<p>It combines aspects of various fields such as biology, earth and atmospheric sciences,chemistry, and physics. (A)</p> Signup and view all the answers

Which of these is NOT explicitly mentioned as an area of environmental impact studied by environmental scientists?

<p>The effect of solar flares on the ozone layer. (B)</p> Signup and view all the answers

What is the ultimate goal of environmental science?

<p>Developing strategies for humans and other species to have a sustainable future. (D)</p> Signup and view all the answers

According to the introduction, which of the following is considered a natural resource?

<p>Minerals and soils (C)</p> Signup and view all the answers

What is emphasized regarding human impact on natural resources?

<p>That many resources have been depleted due to poor management. (A)</p> Signup and view all the answers

Which of the following is an example of a natural resource harvested from ecosystems?

<p>Timber from forests and fish from the ocean (A)</p> Signup and view all the answers

What is the role of environmental scientists regarding natural resources management?

<p>To develop science-based sustainable management strategies. (D)</p> Signup and view all the answers

Which of the following best describes the scope of environmental science?

<p>An analysis of human actions and their influences on environmental systems, including both global and local scales. (D)</p> Signup and view all the answers

Which activity would NOT be considered a typical subject within the scope of environmental science?

<p>Studying the migration patterns of birds. (D)</p> Signup and view all the answers

An 'environment' can be best defined as:

<p>The total set of biotic and abiotic conditions and factors which an organism is surrounded by. (A)</p> Signup and view all the answers

The interdisciplinary nature of environmental science is best described by its:

<p>Integration of concepts from biology, earth sciences, chemistry, physics, and other related fields. (D)</p> Signup and view all the answers

Studying tree growth rings to assess the health of a forest is an example of:

<p>Using indicators to monitor health within environmental systems. (D)</p> Signup and view all the answers

Which of these actions primarily represents a large-scale human effect on the environment?

<p>The emissions of greenhouse gases leading to climate change. (A)</p> Signup and view all the answers

What makes it challenging to assess our overall energy consumption?

<p>The lack of consistent measurement values. (A)</p> Signup and view all the answers

Environmental science uses the scientific method, which includes:

<p>The use of observations, hypothesis testing, field and laboratory research. (B)</p> Signup and view all the answers

An environmental study examining the effects of a local farm's pesticide use on a nearby pond would be best described as a study on a:

<p>A local environment. (C)</p> Signup and view all the answers

When comparing the environmental impacts of paper and plastic bags, what is a key difficulty encountered?

<p>The challenge of weighing different types of environmental harm caused by different substances. (D)</p> Signup and view all the answers

Why is scientific understanding alone insufficient to solve environmental issues?

<p>Human cooperation and actions are necessary but unpredictable. (A)</p> Signup and view all the answers

What occurred with average vehicle fuel efficiency in the U.S. after 1975?

<p>It initially increased but was offset by a shift in consumer preferences towards less fuel-efficient vehicles. (D)</p> Signup and view all the answers

Which period saw a decrease in the overall average vehicle fuel efficiency in the U.S., despite technological improvements in cars?

<p>The 1990s. (C)</p> Signup and view all the answers

What has contributed to the recent change for the better in vehicle fuel efficiency trends?

<p>Policies promoting electric and hybrid vehicles, along with the popularity of smaller SUVs. (C)</p> Signup and view all the answers

When choosing between alternatives such as paper or plastic, what does the process ultimately involve?

<p>Value judgments and personal decisions about various impacts involved. (D)</p> Signup and view all the answers

What was a result of some consumer vehicle preference from the 1990s on overall vehicle fuel efficiency?

<p>A lower average miles per gallon for all vehicles due to an increase in purchases of less efficient vehicles. (A)</p> Signup and view all the answers

What is a key factor influencing the eventual effect on the environment, even with scientific and technological advancements?

<p>Human choices, opinions, and actions. (B)</p> Signup and view all the answers

What is a fundamental characteristic of a system, based on the provided information?

<p>Interconnectedness where changes in one part affect other parts. (B)</p> Signup and view all the answers

According to the information, how are systems defined in practice?

<p>By the researcher perspective. (A)</p> Signup and view all the answers

Which of the following best exemplifies a community ecologist's focus?

<p>The interactions of a species within its ecosystem. (A)</p> Signup and view all the answers

What is the primary focus of a conservation biologist when studying a whale population?

<p>Adverse impacts of human fisheries on the species. (C)</p> Signup and view all the answers

Based on the text, what are system dynamics?

<p>The interaction of components within systems. (C)</p> Signup and view all the answers

What is an essential aspect of all environmental systems?

<p>They involve the exchange of matter or energy. (D)</p> Signup and view all the answers

What is a metaphor for the interconnectedness of global systems?

<p>A butterfly's actions having distant effects. (D)</p> Signup and view all the answers

What is the primary purpose of a mass balance analysis?

<p>To assess the inputs, outputs, and fluxes within a system. (B)</p> Signup and view all the answers

In the context of balance analysis, what does 'net flux' represent?

<p>The difference between inputs and outputs. (A)</p> Signup and view all the answers

What condition is defined as a system where the input equals output, and the size of the pool remains constant?

<p>Steady state (D)</p> Signup and view all the answers

Which of the following is the first step in performing a mass balance analysis?

<p>Measuring the pool’s size. (C)</p> Signup and view all the answers

A bucket holds 15 liters of water. If 2 liters per minute are flowing into the bucket and 2 liters per minute are leaking out, what is true about this system?

<p>The system is in steady state. (D)</p> Signup and view all the answers

What does it mean when a system is no longer in the steady state?

<p>Inputs and outputs are not balanced (A)</p> Signup and view all the answers

Besides mass, what other type of analysis uses the same basic formula of Net Flux = Inputs − Outputs?

<p>Energy and monetary (D)</p> Signup and view all the answers

Which of these natural systems is given as an example of being in steady state?

<p>The water in the atmosphere (C)</p> Signup and view all the answers

Flashcards

Ecological Perspective

The study of how living organisms interact with their environment.

Environmental Conditions

Factors like temperature, rainfall, and sunlight that influence an organism's survival and reproduction.

Resources

The materials and energy sources that organisms require for survival.

Population Ecology

The study of how populations of organisms change in size over time.

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The Logistic Growth Model

A pattern of population growth where the rate of growth slows down as the population approaches its carrying capacity.

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Environmental Science

The science that investigates how human activities affect the environment and develops solutions for sustainable coexistence.

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Human Environmental Impacts

The impact human actions have on the natural world. This can include pollution, habitat destruction, and climate change.

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Human Health Risks

These are dangers to human health that arise from the interaction between humans and the environment.

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Sustainability

The process of using natural resources in a way that meets current needs without compromising the ability of future generations to meet their own needs.

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Natural Resource Management

The management of natural resources, including minerals, soils, water, and biological resources like timber and fish.

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Conservation and Efficiency

These are strategies to reduce the amount of resources used, aiming to decrease environmental impact and save money.

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Peak Demand

This refers to the highest demand for energy during a specific timeframe. It's often aimed at reducing energy waste during peak hours.

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Interdisciplinary Approach

An interdisciplinary area of study that combines elements of different sciences like biology, chemistry, physics, and environmental science.

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Environment

All the conditions and factors, both living and nonliving, that surround an organism, including other organisms, food sources, predators, climate, and landscape.

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Local Environment

The area immediately surrounding an organism or person, including other organisms, food sources, and local weather conditions.

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Global Environment

The sum of all the aspects of the Earth, encompassing all the local environments and their interactions, creating a global system.

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Population Dynamics

The study of how populations of organisms change in size and distribution over time, considering factors like birth rates, death rates, immigration, and emigration.

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Science-based Discipline

The scientific method used to study the environment, including observation, hypothesis testing, data collection, and analysis.

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Environmental Indicator

A measurable characteristic of the environment that indicates the health or condition of an ecosystem. For example, tree growth can indicate forest health.

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Environmental Systems

Different systems within the environment, such as forests, oceans, and the atmosphere, and how they interact with each other.

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Environmental Impact Assessment Challenges

The difficulty in assessing the overall environmental impact of actions with multiple, potentially conflicting outcomes, making it challenging to definitively determine which choice is environmentally superior.

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The Gap Between Technological Progress and Environmental Benefit

The phenomenon where scientific advancements and technological developments promoting environmental improvement are hindered by human choices and lack of cooperation. This can be seen in the case of rising fuel efficiency in cars, countered by consumer preference for SUVs, leading to an overall decrease in national fuel efficiency.

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Average Vehicle Fuel Efficiency

The overall average fuel efficiency achieved by all vehicles within a region.

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Consumer Preference for Larger Vehicles

The preference for vehicles that offer more space, power, or features, often at the expense of fuel efficiency.

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Electric and Hybrid Vehicles

The use of electricity as power and the combination of electric and traditional fuel-powered engines in vehicles.

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Policies Promoting Electric and Hybrid Vehicles

Policies aimed at encouraging the adoption of electric and hybrid vehicles, promoting their use and driving their widespread adoption.

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Popularity of Smaller SUVs

The trend of increased popularity of smaller SUVs, which, despite their size, generally offer better fuel efficiency than larger SUVs.

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Shifting Trajectory in Fuel Efficiency

The change in the trajectory of fuel efficiency due to a shift in consumer preferences and policy interventions, leading to a more positive development in overall vehicle fuel efficiency.

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Steady State

A system where the inputs and outputs are equal, resulting in no change in the size of the pool over time.

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Net Flux

The difference between inputs and outputs for a given system.

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Pool

The total amount of a substance within a defined system. Example- the amount of water in a lake.

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Input

The rate at which a substance enters a system.

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Output

The rate at which a substance leaves a system.

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Mass Balance Analysis

The analysis of inputs and outputs to determine changes in a given system. This is often used to assess the health or stability of a system.

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Steady State System

A system in which the input and output of a substance are equal, the size of the pool does not change over time.

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Net Flux into a system

The rate of change in the size of a pool.

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System

A set of interconnected living or non-living components where changes in one part affect others.

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System Dynamics

The study of how components within a system interact and influence each other.

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Interconnectedness of Systems

The idea that systems on Earth are interconnected, meaning actions in one place can have far-reaching effects.

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Matter and Energy Exchange

The exchange of materials (matter) or energy between different parts of a system.

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Global System (Earth)

The largest and most encompassing system studied in environmental science, encompassing all other systems on Earth.

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Environmental Science in Action

The application of scientific knowledge to understand and address environmental problems, often involving policy, law, and economics.

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Human Impact on Systems

The impact of human activities on the environment, including pollution, habitat destruction, and climate change.

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Human Activity's Role in Systems

The area of environmental science where human actions have the most significant and often detrimental impacts.

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Study Notes

Introduction

  • Environmental science studies the impact of human activities on the environment
  • It includes the pollution of our oceans, deforestation, and global warming
  • It also looks at providing solutions to manage these impacts so humans and other species can have a sustainable future

Section I: Foundations of Environmental Science

  • Environmental science is an interdisciplinary field
  • It includes biology, earth science, atmospheric science, chemistry, physics, and human population dynamics
  • It uses the scientific method to gather and analyze information
  • Scientists use environmental indicators to assess the health of the Earth.

Section II: Biodiversity: From Local to Global

  • Biodiversity includes the diversity of genes, species, habitats, and ecosystems
  • The diversity in genes is a crucial component of biodiversity
  • Scientists look at how populations grow, disperse, and interact
  • Ecosystems are the integration of living and nonliving components within a geographic area
  • Global climate and patterns of temperature, sunlight, and rainfall affect biomes

Section III: The Human Impact on Natural Resources

  • The human population is the primary factor impacting environmental systems
  • The rate of population growth has slowed, but the total number continues to increase
  • Different geographic regions have different rates of resource consumption
  • Human activities greatly influence resource consumption and depletion
  • Individuals have a significant effect on the environment, through daily actions or large-scale projects

Section IV: Science for a Sustainable Future

  • Air pollution includes various substances that harm or alter ecosystems
  • Many different forms of pollution
  • Different sources of energy, both renewable and non-renewable, are available
  • Energy efficiency is a measure of how much work is obtained from a given input of energy
  • Global climate change is a complex process influencing Earth's temperature

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