Extinctions

What word do we use to describe a species which has no members still living?

• endangered
• extinct

Humans are causing extiction in which ways?

• By over hunting animals for food or products.
• By destroying the natural habitat of species.
• By polluting the environments of the world.
• All of the above.

How can you help prevent extinctions?

• By not polluting our environment.
• By protecting sensitive habitats and species.
• By not eating or buying products from endangered animals.
• All of the above.

Which of the following was a natural factor that caused extinctions? 

• Over harvesting
• Changes in the oxygen levels
• Pollution
• Habitat destruction

The Florida panther is a large cat related to lions. Panthers eat deer, rodents, and farmers' livestock. Panthers once lived in Tennessee. Which of these most likely caused panthers to disappear from Tennessee?

• Panthers in Tennessee were unable to reproduce.
• People hunted panthers and destroyed their habitats.
• Natural predators killed and ate all the panthers in Tennessee.
• Panthers in Tennessee ran out of food. 

Which of these describes a species that has become extinct?

• fewer members of the species are dying than being born
• more members of the species are dying than being born
• very few members of a species are alive
• all members of a species have died

Which of the following species is extinct?

• woolly mammoth
• giant panda
• bald eagle
• green sea turtle

Which of the following is NOT a reason a species may become extinct?

• competition
• reproducing
• habitat loss
• overhunting

What will most likely happen to a species of fish if all the female fish are caught?

• The male fish will move away.
• The male fish will build homes to raise their young.
• The species will not survive.
• The young fish will starve.

The snail darter is a small fish that used to live in the Little Tennessee River. In 1978, a dam was built on the river.  How did the dam most likely affect the snail darter?

• The dam did not affect the darters in the river.
• The dam changed the climate of the area.
• The dam changed the darter's habitat.
• The number of darters increased.