Introduction to Physical and Human Geography (D199)

Correct Answer

B. Increased carbon dioxide levels causing higher global temperatures

Explanation

Positive feedback in environmental systems amplifies changes or disturbances. In this case, increased carbon dioxide (CO2) levels lead to higher global temperatures, which in turn can result in further increases in CO2, creating a reinforcing cycle. This feedback loop exacerbates climate change by accelerating warming rather than stabilizing the system.

Why other options are wrong

A. A decrease in greenhouse gases leading to cooler temperatures

This describes a negative feedback loop, where a decrease in greenhouse gases leads to cooling, helping stabilize the system. Negative feedback tends to counteract changes, unlike positive feedback, which amplifies them.

C. The stabilization of ecosystems through balanced nutrient cycles

This represents a form of equilibrium or steady-state system, where feedback mechanisms work to stabilize the environment. It is not an example of positive feedback, which would amplify changes instead of maintaining balance.

D. The reduction of ice cover resulting in increased albedo

While this is a feedback mechanism, it is an example of negative feedback. Reduced ice cover decreases the Earth's albedo, causing more heat absorption and further melting. However, it does not constitute positive feedback in the same way as the CO2 and temperature relationship.

Correct Answer

A. The size and shape of countries in the higher latitudes are greatly exaggerated.

Explanation

The Mercator projection distorts the size and shape of countries as they move further from the Equator, particularly in the higher latitudes (near the poles). This projection is commonly used for navigation because it preserves angles and shapes, but it greatly exaggerates the size of areas closer to the poles.

Why other options are wrong

B. The size of all countries is accurate, but the shape is distorted.

This is incorrect because the Mercator projection distorts both the size and shape of landmasses, particularly in polar regions.

C. Countries near the Equator appear 50 percent larger than countries in the middle latitudes.

This statement is inaccurate as the Mercator projection exaggerates the size of countries near the poles, not the Equator. Countries near the Equator are shown more accurately.

D. The projection is designed to maintain undistorted outlines of landmasses.

While the Mercator projection preserves angles and shapes for navigation, it does not maintain undistorted landmass outlines, especially at high latitudes.

 E. Distances on the Mercator projection are real and accurate.

This is incorrect because distances are not accurate in the Mercator projection, especially as you move away from the Equator. The projection distorts distances in higher latitudes.

Correct Answer

B. ecosystem

Explanation

An ecosystem is a natural system that includes both the community of organisms (plants, animals, microorganisms) and the physical environment in which they interact. This system encompasses all living and nonliving components that function together as a unit, such as a forest ecosystem, a marine ecosystem, or a freshwater ecosystem. The balance of these components is essential for maintaining biodiversity and ecosystem services.

Why other options are wrong

A. environment is incorrect because the term "environment" refers more broadly to the surrounding conditions and influences that affect an organism or community. While it is related, it doesn't specifically denote the dynamic interactions between living organisms and their surroundings like an ecosystem does.

C. Earth system is incorrect because it refers to the Earth as a whole, including all of its physical and biological processes. While ecosystems are part of the Earth system, the Earth system also includes larger-scale processes like atmospheric and oceanic circulation, plate tectonics, and more.

D. components are incorrect because they are too vague. "Components" could refer to any part of an ecological system, but it does not define the entire system like "ecosystem" does, which specifically describes the interactions among living organisms and their physical environment.

Correct Answer

B. A unique area distinguished by its cultural and physical characteristics

Explanation

In human geography, the concept of "place" refers to a specific area that is characterized by both its physical and cultural attributes. A place is not just a location on a map, but a space that carries meaning and identity due to the interactions of its physical environment and human influences. This could include natural features like mountains or rivers, as well as human-made elements like buildings, cultural practices, and history.

Why other options are wrong

A. A location identified by its geographic coordinates

While geographic coordinates can pinpoint a location, they do not convey the cultural or physical significance that defines a "place" in human geography. A place is more than just a point on a map; it involves the connection to the environment and human experiences.

C. A region defined solely by its economic activities

A region defined solely by its economic activities is a partial description of what could be considered a "functional region," but it does not capture the full meaning of "place," which incorporates both cultural and physical characteristics, not just economic ones.

D. A space that lacks any human influence

A place in human geography is inherently shaped by human influence, whether through cultural, social, or historical factors. A space lacking human influence would be more appropriately described as an area of the natural environment, rather than a "place" in the human geography sense.

Correct Answer

C. a set of objects linked together by their relationships to one another

Explanation

In geography, a system is understood as a group of interrelated components or elements that function together. The relationships and interactions among these parts determine how the system operates as a whole. This definition is foundational in understanding natural systems like ecosystems, climate systems, and human-environment interactions.

Why other options are wrong

A. a set of objects completely independent of one another

This contradicts the concept of a system, which by definition includes interdependence among its components. Independent objects do not form a system since they do not interact or influence each other.

B. a set of objects whose size, shape, and temperature can be measured

While these characteristics can describe objects, they do not define a system. A system involves relationships and interactions, not just physical properties.

D. a set of objects comprised of continents, oceans, forests, and deserts

This option lists examples of physical features but does not address the defining characteristic of a system — the interconnections and interactions between components. Without the relational aspect, this does not qualify as a system by geographic standards.

Correct Answer

D. cryosphere

Explanation

The cryosphere refers to the frozen water part of the Earth's hydrosphere, including ice sheets, glaciers, and frozen ground (permafrost). It plays a crucial role in regulating the Earth's climate, as it reflects sunlight and influences sea level.

Why other options are wrong

A. zone of ablation

The zone of ablation is an area of a glacier where ice is lost due to melting, sublimation, or calving. It is not the frozen part of the hydrosphere but rather the area where ice is being removed.

B. zone of accumulation

The zone of accumulation is the area of a glacier where snow and ice accumulate over time, contributing to the glacier's growth. It is not the perennially frozen part of the hydrosphere but rather the area where snow and ice build up.

C. periglacial region

The periglacial region refers to areas adjacent to glaciers where the ground is frozen, typically in cold environments, but it is not specifically the frozen part of the hydrosphere. The cryosphere encompasses more than just periglacial regions, including glaciers and ice caps themselves.

Correct Answer

B. The science and art of making an illustrated map or chart

Explanation

Cartography is the study and practice of making maps. It involves both scientific and artistic elements, as cartographers must accurately represent geographical features while also presenting them in a visually appealing and understandable way. Cartography is crucial for mapping the world and visualizing spatial information.

Why other options are wrong

A. An east/west measurement of position

This refers to longitude, which is a specific measurement used in geography to indicate position on the Earth's surface. Longitude is part of the field of geographic coordinates, not cartography itself.

C. A system that stores, views, and analyzes geographic data, creating multidimensional charts or maps

This describes a Geographic Information System (GIS), not cartography. GIS involves the use of computer systems to manage and analyze geographic data, whereas cartography focuses on the design and creation of maps.

D. A round, coin-sized object, uniquely numbered and hidden in a geocache

This refers to a geocaching item, specifically a "geocoin." Geocaching is a recreational activity, unrelated to the scientific and artistic practice of cartography.

Correct Answer

D. environmental dynamics

Explanation

Physical geography is concerned with understanding the Earth's physical features and the processes that shape them. It focuses on environmental dynamics, including the study of landforms, climate, ecosystems, and natural phenomena, and how they interact with each other. This includes examining how natural processes affect the environment and the planet’s surface over time.

Why other options are wrong

A. social dynamics

Social dynamics refers to the study of social relationships and structures, which is part of human geography, not physical geography. While social systems can influence the environment, they are not the primary focus of physical geography.

B. cultural dynamics

Cultural dynamics, which involves the study of human culture and its impact on geography, falls under the domain of human geography, not physical geography. Physical geography focuses on natural systems and processes.

C. language dynamics

Language dynamics deals with language distribution and evolution, which is also a human geography concern. Physical geography is focused on natural physical phenomena rather than human elements like language.

Correct Answer

B. Biodiversity

Explanation

Biodiversity is crucial to the stability and resilience of ecosystems. A high diversity of species ensures that ecosystems can maintain functions, recover from disturbances, and adapt to changes. Different organisms play various roles, such as pollination, decomposition, and predation, contributing to a self-regulating and balanced system.

Why other options are wrong

A. Climate stability

While climate stability can influence ecosystems, it does not directly cause them to be self-balancing. Ecosystems may adapt to changing climates, but it is the internal diversity and interaction of species that allows for balance and resilience. Climate stability is a contributing factor, not the primary mechanism of balance.

C. Strong feedback loops

Feedback loops exist in ecosystems, but they are a result of interactions among species and environmental factors. Without biodiversity, these feedback mechanisms would not function properly. Feedback loops are influenced by biodiversity but are not the foundational reason for ecosystem self-balancing.

D. Nutrient cycling

Nutrient cycling is a critical ecosystem function, but it relies on biodiversity to be effective. Decomposers, plants, and animals all contribute to this process. Without diverse species to maintain this cycle, the ecosystem could become unbalanced. Therefore, nutrient cycling is a result of biodiversity, not the root cause of self-balance.