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Environmental Science Terms
Ch. 8-12 Key Terms
33
Environmental Studies
Undergraduate 1
06/13/2008

Additional Environmental Studies Flashcards

 


 

Cards

Term
Population Ecology
Definition
  • A branch of biology that deals with the numbers of a particular species found in an area and how and why those numbers change (or remain fixed) over time.
  • Study of populations and why their numbers change over time.
Term
Population Density
Definition

The number of individuals of a species per unit area or volume at a given time.

Term
Carrying Capacity
Definition

The maximum number of individuals of a given species that a particular environment can support for an indefinite period, assuming there are no changes in the environment.

 

Abbreviated as K

Term
Environmental Limits/Resistance
Definition

Prevent indefinite reproduction.

 

Includes unfavorable food, water, shelter, predation, waste accumulation, competition, etc. 

Term
Population Crash
Definition

An abrupt decline from high to low population density.

 

A population that overshoots the carrying capacity.

Term
Survivorship
Definition
The probablity that an given individual in a population will survive to a particular age.
Term

R-selected Species

vs.

K-selected Species

 

At least 3 characteristices of each.

Definition

R-Selected: small body size, early maturity, short life span, large broods, little or no parental care, mosquitoes and dandelions

 

K-selected: small broods, long life span, slow development, large body size, late reproduction, redwood trees and human beings

Term
Food security
Definition
The condition in which people do not live in hunger or fear of starvation.
Term
Food Insecurity
Definition
The condition in which people live with chronic hunger and malnutrition.
Term
Culture
Definition

The ideas and customs of a group of people at a give period.

 

Passed on from generation to generation, evolves over time.

Term
Gender Inequality
Definition
The social construct that results in women not having the same rights, oppourtunities, or privaleges as men.
Term
Family Planning
Definition
Services that enable men and women to limit family size, safeguard individual health rights, and improve the quality of life for themselves and their children.
Term
Population Growth Momentum
Definition
The potential for future increases or decreases in a population based on the present age structure.
Term
Pronatalist
Definition

A person who is in favor of population growth.

Term
Urbanization
Definition
The process in which people increasingly move from rural areas to densely populated cities.
Term
Urban Agglomeration
Definition

An urbanized core region that consists of several adjacent cities or megacities and their surronding developed surburbs.

Term
Megacities
Definition
Cities with more than 10 million inhabitants.
Term
Urban Heat Island
Definition
Local heat buildup in an area of high population density.
Term
Dust Dome
Definition

A dome of heated air that surronds an urban area and contains a lot of air pollution.

Term
Brownfields
Definition
An urban area of abandoned vacant factories, warehouses, and residential sites that may be contaminated from past uses.
Term
Compact Development
Definition
The design of cities in which tall, multiple-unit residential buildings are close to shopping and jobs, and all are connected by public transportation.
Term
Land Use Planning
Definition
The process of deciding the best uses for undeveloped land in a given area.
Term
Fossil Fuels
Definition

Combustible deposits in Earth's crust, composed of the remnants (fossils) of prehistoric organisms that existed millions of years ago.

 

Coal, oil (petroleum), and natural gas are the trhee types of fossil fuels.

Term
Scrubbers
Definition
Desulfurization systems that are used in smokestacks to decrease the amount of sulfur released in the air by 90% or more.
Term
Resource Recovery
Definition
The process of removing any material - sulfure or metals, for example - from polluted emissions or solid waste and selling it as a marketable product.
Term
Structural traps
Definition
Underground geologic structures that tend to trap any oil or natrual gas if it is present.
Term
Coal Gasification
Definition
The technique of producing a synthetic gaseous fuel (such as methane) from solid coal.
Term
Synfuel
Definition
A liquid or gaseous fuel that is synthesized from coal and other naturally occurring resources and used in place of oil or natural gas.
Term
Isotopes
Definition

An alternate form of the same element that has a different atomic mass.

 

Has a different number of neutrons but the same number of protons and electrons.

Term

Nuclear Energy

Definition
The energy released by nuclear fission or fusion.
Term

Nuclear Fission

Definition
The splitting of an atomic nucleus into two smaller fragments, accompanied by the release of a large amount of energy.
Term

Nuclear Fussion

Definition
The joining of two lightweight atomic nuclei into a single, heavier nucleus, accompanined by the release of a large amount of energy.
Term
Radioactive Half-life
Definition
The time required for one-half of a radioactive substance to change into a different material.
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