Why do whales spout water?

ASLAM ASKED - "MA'AM,WHY DOES A WHALE SPOUT:" MA'AM REPLIED -"A WHALE DOES NOT HAVE GILLS TO BREATHE.WHALES BREATHE THROUGH THEIR LUNGS.THEIR NOSTRILS ARE ON THEIR HEADS.WHEN A WHALE GOES UNDER WATER,THEIR NOSTRILS GET CLOSED BY LITTLE VALVES AND THE AIR PASSAGES ARE SHUT OFF FROM THE MOUTH SO THAT WATER DOES NOT GO INTO THE LUNGS.

WHALES USUALLY RISE TO BREATHE OVER FIVE OR TEN MINUTES.BUT SOME TIMES THEY REMAIN UNDERWATER FOR THREE-QUARTERS OF AN HOUR!

YOU WILL BE SURPRISED TO KNOW THAT SOME WHALES HAVE BEEN KNOWN TO DIVE 600 METRES DEEP !"