Share Environmental Science 2.2 Quiz Review
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A population’s _____ is the number of offspring produced over a given time period.
Birthrate
The ____ is the number of individuals that die over a given time period.
Death Rate
When a population is in ideal conditions with unlimited resources, it grows in a pattern called ___.
Exponential Growth
During ___, as a population gets larger, it grows at a faster rate.
Exponential Growth
Food shortages, natural disasters, disease, and predation can ___ population size.
Reduce
An ___ is a species that has died out and has no living individuals.
Extinct Species
Extinctions can be caused by predation, natural disasters, or damage to the ___.
Environment
An ___ is a species whose population is at risk of extinction.
Endangered Species
A ___ is a species that is at risk but is not yet endangered.
Threatened Species
___ is the instinctive seasonal movement of a population of organisms from one place to another. Many animals migrate to where food is more available.
Migration
Human population size is affected by the same three factors that determine the sizes of all populations—birthrate, death rate, and ___.
Movement
Unlike other species, humans have developed ways to increase the ___ of their environment.
Carrying Capacity
Human population growth can have negative effects on other ___.
Species
Better access to food and other ___, such as fossil fuels, cloth, and metals, has led to human birthrates being higher than death rates.
Resources
Improvements in water treatment and medical care have helped reduce human ___.
Death Rates
Humans commonly move from place to place, affecting the local ___ size.
Population
