Scuba Diving and Gas Laws

What is the pressure at the Earth's surface equivalent to?

• 760 mm of mercury

• 500 mm of mercury

• 1000 mm of mercury

• 300 mm of mercury

What happens to the pressure around us as we go higher in altitude?

• It increases

• It decreases

• It remains the same

• It fluctuates

What is the pressure change experienced by divers for every 10 meters of depth?

• One atmosphere

• Two atmospheres

• Three atmospheres

• Four atmospheres

According to Boyle's law, how does the volume of a gas sample vary with its pressure?

• Directly

• Inversely

• Exponentially

• Linearly

What is the pressure equivalent in the lungs of divers at a depth of 30 meters?

• One atmosphere

• Two atmospheres

• Three atmospheres

• Four atmospheres

What can happen if divers do not breathe out regularly as they return to the surface?

• Their lungs will collapse

• Their lungs will expand and may rupture

• They will experience no change

• They will feel less pressure

According to Boyle's law, what happens to the volume of a flexible gas container when the surrounding pressure decreases to one half its original value?

• The volume doubles

• The volume halves

• The volume remains the same

• The volume triples

What principle explains the solubility of gases in liquids under pressure?

• Boyle's law

• Charles's law

• Henry's law

• Avogadro's law

What is the main reason divers need to follow decompression tables?

• To avoid nitrogen narcosis

• To prevent gas bubble formation in the blood

• To increase the solubility of gases in the blood

• To ensure the purity of compressed air

What is the effect of nitrogen gas at higher pressures on divers?

• It causes increased solubility of gases in the blood

• It has a narcotic effect

• It purifies the compressed air

• It decreases the volume of the lungs