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Populations and Resources


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preservation movement of individuals into a population
endangered species solid wastes that can be broken down by natural processes
nonrenewable resource species with numbers of individuals so low that it is in danger of extinction
acid precipitation planned management of wildlife habitats and other natural areas to prevent exploitation or destruction
fossil fuel the movement of individuals out of a population
carrying capacity maximum, stable population size an environment can support over time
threatened species study of populations that includes birth rates and death rates, fertility rates, age structure, and geographic distribution
greenhouse effect occurs when the last members of a species die
ozone layer protective layer at the top of the stratosphere; it absorbs most of the sun's harmful radiation
age structure factors that limit population density
conservation most often weather-related occurrences that affect populations regardless of their density
immigration renewable or nonrenewable parts of the natural environment that are used by humans
biodegradable solid particles of soot contained in smoke released by burning fossil fuels
demography resources replaced or recycled by natural processes
pollution proportions of any given population that are either in their pre-reproductive, reproductive, or post-reproductive years
renewable resources resources available in limited amounts that cannot be replaced and cannot be recycled quickly by natural means
exponential growth keeping an organism or an area from harm or destruction by the establishment of parks, wildlife habitats, and other refuges
groundwater rain or snow more acidic than unpolluted rainwater
nonbiodegradable coal, oil, and natural gas formed from the buried remains of organisms
extinction species that have rapidly decreasing numbers of individuals
natural resource type of urban air pollution resulting from a combination of chemical pollutants, particulate matter, and sulfur dioxide
density-dependent factor fresh water from rain and surface streams that accumulates in underground reservoirs
particulate a natural phenomenon by which carbon dioxide and other atmospheric gases prevent heat from escaping into space
emigration contamination of air, water, or land by wastes produced in such excess that they cannot be recycled by natural processes
smog explosive population growth in which the number of reproducing individuls increases by an ever-increasing rate
density-independent factor types of wastes that are not easily broken down and can exist in the enrionment for many years

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