Global warming will boost extinctions   questions


Please write complete sentences on a sheet of loose leaf paper.


1.  Describe "global warming" in 3 - 4 sentences.  Use your notes or review book for this answer.

2.  Why will the extinction rate be greater in South America than in North America and Europe?

3.  How did Mark Urban come up with a general average extinction rate for the globe at 7.9%?

4.  Why do other scientists think that Mr. Urban has underestimated the real rate of species loss a little?

5.  Be sure you have read the entire short article before you answer this question.  State the 3 causes (man-made (unnatural) and natural) for these extinctions.