xcountx=1&aacount=16&sw0=drifted&sw1=prehistoric&sw2=mammals&sw3=creatures&sw4=geology&sw5=continent&sw6=erosion&sw7=volcano&sw8=omnivore&sw9=herbivore&sw10=carnivore&sw11=insectivore&sw12=vicious&sw13=disappearance&sw14=opportunity&sw15=The+dinosaurs+probably+became+extinct+due+to+changes+in+climate+and+habitat.&fn0=audio%2Fbook_06_13%2Fdrifted.mp3&fn1=audio%2Fbook_06_13%2Fprehistoric.mp3&fn2=audio%2Fbook_06_13%2Fmammals.mp3&fn3=audio%2Fbook_06_13%2Fcreatures.mp3&fn4=audio%2Fbook_06_13%2Fgeology.mp3&fn5=audio%2Fbook_06_13%2Fcontinent.mp3&fn6=audio%2Fbook_06_13%2Ferosion.mp3&fn7=audio%2Fbook_06_13%2Fvolcano.mp3&fn8=audio%2Fbook_06_13%2Fomnivore.mp3&fn9=audio%2Fbook_06_13%2Fherbivore.mp3&fn10=audio%2Fbook_06_13%2Fcarnivore.mp3&fn11=audio%2Fbook_06_13%2Finsectivore.mp3&fn12=audio%2Fbook_06_13%2Fvicious.mp3&fn13=audio%2Fbook_06_13%2Fdisappearance.mp3&fn14=audio%2Fbook_06_13%2Fopportunity.mp3&fn15=audio%2Fbook_06_13%2Fdictation.mp3