Human Population Growth
This model describes how population growth rates change as a nation industrializes.
What is the Demographic Transition Model?
About this percentage of energy is transferred from one trophic level to the next.
What is 10%?
These two abiotic factors most strongly determine terrestrial biome types.
What are temperature and precipitation?
This term refers to the variety of life at the genetic, species, and ecosystem levels.
What is biodiversity?
This natural process keeps Earth warm but is being intensified by human activity.
What is the greenhouse effect?
Education and access to this social service are key factors in lowering fertility rates in developing nations.
What is family planning?
This type of symbiotic relationship benefits both species involved.
What is mutualism?
This process results when unrelated species evolve similar traits in similar environments.
What is convergent evolution?
Habitat loss, invasive species, pollution, and overharvesting are all examples of these threats.
What are threats to biodiversity?
This gas, released by agriculture and livestock, is more potent than carbon dioxide in trapping heat.
What is methane (CH4)?
This equation expresses how population, affluence, and technology combine to influence environmental impact.
What is the IPAT equation?
This type of ecological succession begins on bare rock where no soil exists.
What is primary succession?
This phenomenon occurs when moist air rises and drops precipitation on one side of a mountain, creating dry conditions on the other.
What is a rain shadow?
This theory explains patterns of species richness based on island size and distance from the mainland.
What is the island biogeography theory?
Efforts to reduce greenhouse gas emissions represent this type of response to climate change.
What is mitigation?
As population grows, this type of loss often increases due to greater land use and resource demand.
What is habitat or biodiversity loss?
The removal of this type of species can trigger a trophic cascade that destabilizes an ecosystem.
What is a keystone species?
Global warming is expected to shift biome boundaries toward these directions on Earth.
What are the poles or higher elevations?
Breaking large habitats into smaller patches creates more of this type of habitat, where species are more vulnerable.
What is edge effect?
Energy sources like wind, solar, and hydroelectric power help address climate change by reducing dependence on these fuels.
What are fossil fuels?
Expanding human populations burn more fossil fuels and clear more land, leading to this global environmental problem.
What is climate change (or global warming)?
Human activities such as deforestation and fossil fuel combustion have altered this major biogeochemical cycle.
What is the carbon cycle?
Human land-use changes such as deforestation and urbanization reduce vegetation cover, altering this property that affects surface reflectivity.
What is albedo?
When changing climate zones and shrinking habitats occur together, this risk increases for many species.
What is extinction risk?
This single human activity connects population growth, biodiversity loss, and climate change, influencing nearly every Earth system.
What is deforestation (or burning fossil fuels)?