To encourage students who are blind or visually impaired to discover if there is a relationship between depth and pressure
Pressure can be felt, not seen. The results of pressure can be seen but also observed tactually. The amount of force acting on a unit of area is called pressure. Pressure is equal to force divided by area. Pressure can be changed by changing the force. When the area of applied pressure stays the same, increasing the amount of force will increase the pressure.
Pressure can also be changed by changing the area in which the force is pushing. If you apply the same amount of force to a larger area, the pressure is decreased. Pressure can also be found and felt in nature. When pumped into a tire or a balloon, air exerts pressure to keep the item inflated. The air pressure in a tire can be great enough to support the weight of a truck. The pressure exerted by moving air, or wind, can turn the vanes of a windmill or keep a kite flying. The pressure exerted by a volume of water can cause water to flow a grater distance.