Human population growth can have negative effects on other ___.

Food shortages, natural disasters, disease, and predation can ___ population size.

Improvements in water treatment and medical care have helped reduce human ___.

Extinctions can be caused by predation, natural disasters, or damage to the ___.

The ____ is the number of individuals that die over a given time period.

___ is the instinctive seasonal movement of a population of organisms from one place to another. Many animals migrate to where food is more available.

When a population is in ideal conditions with unlimited resources, it grows in a pattern called ___.

Humans commonly move from place to place, affecting the local ___ size.

Better access to food and other ___, such as fossil fuels, cloth, and metals, has led to human birthrates being higher than death rates.

Lack of food, natural disasters, disease, and predation are reasons why a population might ___ in size.

A population’s _____ is the number of offspring produced over a given time period.

A ___ is a species that is at risk but is not yet endangered.

An ___ is a species that has died out and has no living individuals.