Padi Open Water Chapter 2 question n answers graded A+ 2023

Padi Open Water Chapter 2 How does looking at something underwater affect its apparent size - correct answer Things look larger and/or closer, depending on your perspective How does water affect light intensity and color - correct answer water absorbs colors one by one as light travels down through water - red first, then orange and yellow How does being underwater affect hearing - correct answer Sound travels further in water than in air and travels 4 times faster in water making it hard to tell where a sound comes from How does the rate of body heat loss in water compare to the rate of body heat loss in air - correct answer water conducts heat 20 times faster than air What should you do if you begin to shiver underwater - correct answer get out of the water immediately, dry off and seek warmth How should you move underwater to compensate for the increased resistance to water - correct answer Slowly and steady. Avoid fast jerky movements. How do you breath underwater for maximum efficiency - correct answer slowly and deeply What are the symptoms of diving overexertion - correct answer fatigue, labored breathing, a feeling of suffocation, weakness, anxiety, headache, muscle cramping or a tendency to panic How do you prevent diving overexertion - correct answer move slowly and avoid prolonged exertion, pace yourself and know your limits What should ou do if you become overexerted while diving - either at the surface or underwater - correct answer Surface - establish buoyancy and stop moving Underwater- stop all activity, breathe deeply and rest. Catch your breath and relax until you are breathing normally again What are 3 techniques used for airway control - correct answer 1. always inhale slowly so water does not get pulled into throat s inhale cautiously after clearing your snorkel or regulator 3. use your tongue as a splash guard bu putting the tip on the roof of your mouth What are 2 reasons for wearing a wetsuit - correct answer 1. reduce heat loss 2. protect you from minor scrapes, stings and abrasions How do dry suits and wet suits insulate divers - correct answer Dry suits trap air and wet suits trap water that gets warmed by your body Why must a wet suit fit snugly - correct answer You don't want too much water going in and out which will make you cold What 2 properties may an exposure suit lose due to increased water pressure at depth - correct answer buoyancy and insulation What 3 factors should you consider when selecting an exposure suit - correct answer warmth, fit and comfort What four procedures apply to caring for an exposure suit - correct answer 1. rinse 2. dry inside out 3. store 4. lubricate dry suit zippers Why do you need a hood and what are 3 basic types of hoods - correct answer Hoods keep your head and body warm and provide some protection from abrasions. We lose 75% of heat through head 1. bibbed hoods - tuck into wet suit or jacket