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Life at Risk - Quiz

manatee
1. Species are species that no longer exist on Earth are

endangered

threatened

extinct

2. Changes in an environment

are always natural

are caused by humans

can be natural or can be caused by humans

3. Some scientists think dinosuars became extinct 

after a meteorite hit the Earth

because of human activity

because they evolved into birds
 

4. Scientists estimate that

over 1/5 of the species that once lived on Earth are now extinct

over 2/3 of the species that once lived on Earth are now extinct

over 1/2 of the species that once lived on Earth are now extinct
 

5. The West Indian manatee is an endangered species due to

a combination of natural and man-made causes

disease

an increase in water temperatures
 

Score = 
Correct answers:

Image Credits: Clipart.com



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