What Is an Invasive Species? - Definition, List & Effects


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To be considered an invasive species by the United States federal government, a species must be:

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1. What factor has led to the increase in invasive species in recent decades?

2. Which of the following is NOT a commonly known invasive species?

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About This Quiz & Worksheet

Invasive species is the term used to describe non-native plants, animals, and microbes that are introduced into a new ecosystem where they cause range of negative effects. This quiz/worksheet combo helps you understand the origin of invasive species, the reason they can thrive in a new setting, and the risks they pose.

Quiz & Worksheet Goals

In these assessments you'll be tested on:

  • U.S. Government definition of an invasive species
  • Causes of the recent increase in invasive species
  • Examples of invasive species
  • Resources used to combat the problem
  • Types of damage caused by invasive species

Skills Practiced

This quiz and worksheet lets students practice the following skills:

  • Information recall - access your knowledge on the causes and effects of invasive species
  • Making connections - use your knowledge to examine how and why invasive species are able to dominate an ecosystem
  • Knowledge application - use your understanding of invasive species to answer questions about the different types of harm they cause

Additional Learning

To learn more, review the accompanying lesson What Is an Invasive Species? - Definition, List & Effects. This lesson covers the following objectives:

  • Understand the ways non-native species affect native species
  • Cite some of the entry points for non-native species
  • Describe how invasive species can affect the economy and human health
  • Explain why invasive species can flourish in a new environment