CHANGING POPULATION

• How do population change: They change because of the birthrate and deathrate.
• Birthrate ,also known as natality rate ,the number of offspring produced over the same time period

  Birthrate > Deathrate= Population Increases
• Deathrate ,also known as mortality rate,the number of individuals that die over time

  Birthrate < Deathrate= Population Decreases
• Exponential Growth is when a population is in ideal condition with unlimited resources. The larger the population gets, the faster it grows
• Factors that can decrease the size of a population

  1.) Natural Disaster 2.) Diseases

  3.) Predation 4.) Competition
• Extinction are species that has died our and no individual are left. It can be caused by predations, natural disaster, or damage to the environment
• Endangered Species are species whose population is at risk of extinction
• Threatened Species are species at risk, but not yet endangered
• Movement

  1.) Immigration

  individual enters a population

  2.) Emmigration

  individual leaves a population