Barrons AP Environmental Science

(E) ecosystem

For Question 20, refer to the shaded locations in the world map below.

20. The darker shaded areas in the map above are known as

(A) tropical    rainforests

(B) grasslands

(C) taiga   (boreal forest)

(D) chaparral

(E) tundra

FREE-RESPONSE QUESTION

Your    Advanced    Placement   Environmental   Science class   was invited to  tour

the  tropical    rainforest  in  Panama  and     visit   Gatún   Lake.   Gatún   Lake    is  an

artificial  lake    created for the operation   of  the locks   in  the Panama  Canal.  A

significant  environmental   problem     that    occurs  with    Gatún   Lake    is  the

drainage    of  freshwater—up   to  52  million gallons (197    million liters) leaves

the  lake    every   time    a   ship    passes  through     the     canal.  Although    there   is

sufficient  annual  rainfall    to  replenish   the water   used    by  the canal,  the seasonal