Last Updated 07 November 2000 by Reeb Test Underwater Pressure 1. Now put the end of the straw near the bottom of the jar and blow again.
Water has weight, as anyone who has lifted a bucket of water knows.
The pressure in the ocean, or any body of water, is proportionate to the depth below the surface. At the great depths of underwater exploration the pressure may be tremendous and any underwater vehicle, like a submarine, must be very strong in order to withstand the weight of the water.