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Lesson PreviewLesson 9 of 10 in this unit

9.9 Endangered Species

Part of Global Change in AP® Environmental Science. Read the opening section, then create a free account for the full interactive lesson, practice, and progress tracking.

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Species become threatened or endangered when their populations decline to dangerously low levels. Extinction is the permanent loss of a species. Earth is currently experiencing what scientists call the sixth mass extinction event, driven by human activity.

In this unit

10 lessons

  1. 9.1Stratospheric Ozone DepletionPreview lesson
  2. 9.2Reducing Ozone DepletionPreview lesson
  3. 9.3The Greenhouse EffectPreview lesson
  4. 9.4Increases in the Greenhouse GasesPreview lesson
  5. 9.5Global Climate ChangePreview lesson
  6. 9.6Ocean WarmingPreview lesson
  7. 9.7Ocean AcidificationPreview lesson
  8. 9.8Invasive SpeciesPreview lesson
  9. 9.9Endangered SpeciesThis lesson
  10. 9.10Human Impacts on BiodiversityPreview lesson

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