Lesson Worksheet: Extinction Science

In this worksheet, we will practice defining extinction, recalling why species may go extinct, and explaining the impact extinction can have on ecosystems and biodiversity.

Q1:

For the following statements about extinction, state if they are true or false.

Meteors colliding with Earth, and the aftereffects, could cause a mass extinction.

  • AFalse
  • BTrue

Humans are not responsible for any species’s extinction.

  • AFalse
  • BTrue

Mass extinctions occur when only a few species of plants are affected.

  • ATrue
  • BFalse

Q2:

Extinctions can also be caused by human interference. Which of the following is a human activity that could result in mass species extinction?

  • AGardening, leading to the removal of some plant species
  • BReforestation to reestablish lost habitats for species
  • CStoring seeds in gene banks, which requires the removal of seeds from existing plants
  • DPollution, leading to warming the global temperature

Q3:

Ras Mohammed National Park (Egypt) is an example of a natural protectorate, or protected area. How does this help prevent extinction of species?

Ras Mohamed National Park in Egypt
  • AIt provides an area where species can be bred in captivity to be released into the wild when they are adults.
  • BIt provides an area of land that can be constantly deforested then reforested.
  • CIt designates an area where species are protected from hunting, building, or other changes.
  • DIt provides an area of land where no humans are allowed to go, and the ecosystem is left untouched.

Q4:

Which of the following allows humans to gain information about species that existed millions of years ago and have gone extinct?

  • AFossils
  • BGenetic engineering
  • CRewilding
  • DPhotographs

Q5:

Complete the following: A ecosystem is more likely to be affected by one species going extinct than ecosystem.

  • Amarine, a terrestrial
  • Bplant, an animal
  • Cprimary, a secondary
  • Dsimple, a complex

Q6:

Extinctions can occur on a large scale with many different species, which is known as a mass extinction. Which of the following is a potential cause of a mass-extinction event?

  • AAn increase in available sunlight
  • BA decrease in human activities, such as traveling between countries
  • CToxic or harmful gases released from a large volcanic eruption
  • DA disease specific to one species being passed through a population

Q7:

Which of the following is a strategy used to prevent species from going extinct?

  • AMerging natural habitats of different species to encourage breeding
  • BRemoving large areas of natural forests to encourage species migration
  • CCreating laws that make it illegal to hunt endangered animals
  • DIncreasing the number of buildings in a very biodiverse area

Q8:

What does the term extinct mean?

  • AA species only exists in the wild and not in captivity.
  • BThere are only a few hundred members of a species left.
  • CA species is at risk of disappearing.
  • DThere are no surviving members of a species.

Q9:

Which of the following correctly links extinction and biodiversity?

  • AThe more species that go extinct from an area, the higher the biodiversity.
  • BExtinction has no effect on biodiversity.
  • CThe more species that go extinct from an area, the lower the biodiversity.

Q10:

Some species are classified as endangered. What does this mean?

  • AThe individuals of that species are highly dangerous to humans.
  • BThe number of individuals of that species is rapidly increasing.
  • CThe species is at risk of going extinct.
  • DThe only surviving members of the species are in captivity.

This lesson includes 9 additional questions for subscribers.

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