Objects underwater appear Study guides, Class notes & Summaries

1. Objects under water appear ANS Closer and larger than they do on land 2. How much faster does sound travel in water, compared to air? ANS 4 times 3. Water conducts heat away from your body ANS 25 times faster than air does 4. As you descend ANS colors fade, reds and oranges fade first, 30 meters seem blue and gray 5. water temp does your body need thermal protection ANS 86 degrees 6. What does SCUBA mean ANS self-contained underwater breathing apparatus 7. When water stratifies it...

What type of marine life cause most diving injuries? - ️️Most diving injuries result from animal's defensive response to a perceived threat How much larger and closer do objects appear underwater and why? - ️️Objects underwater appear 25% larger and 25% closer What sets SDI apart from other training agencies? - ️️First dive training agency to provide entry level scuba instruction that incorporates the use of personal dive computers --> more streamlined scuba course w/ more ...

SDI SCUBA CERTIFICATION EXAM STUDY GUIDE| LATEST UPDATE Define SCUBA - S - self C - contained U - underwater B - breathing A - apparatus List 3 important scuba diving changes that occurred in 1950s - 1) published USN dive tables 2) invented the personal dive computer 3) equipment manufacturers made improvements to the design and workmanship of gear Name 3 different devices that modern dive computers replace - 1) dive tables 2) J-valves 3) depth gauges What sets SDI...

1. Objects under water appear 1: The same size as they do on land. 2: Twice as large as they do on land. 3: Closer and larger than they do on land. 4: Smaller and farther away than they do on land.: Closer and larger than they do on land. 2. As you descend: 1: Colors appear to fade. 2: Reds and oranges are among the first colors to disappear. 3: At 30 m/99 ft, little color remains other than blues, grays, blacks and whites. 4: All of the above.: All of the above. 3. Which of the followin...

SDI OPEN WATER SCUBA DIVER EXAM 2024 WITH 100% ACCURATE ANSWERS Objects under water appear - correct answer Closer and larger than they do on land How much faster does sound travel in water, compared to air? - correct answer 4 times Water conducts heat away from your body - correct answer 25 times faster than air does As you descend - correct answer colors fade, reds and oranges fade first, 30 meters seem blue and gray water temp does your body need thermal protection - correct ...

The purpose of equalization is to - Introduce additional air into body air spaces in response to increasing external pressure Body heat is lost ________ than in air - 25 to 30 times faster The absolute pressure expressed in terms of atmospheres absolute at 99 feet in salt water - 4 ata One atmosphere of pressure is defined as - - Each 34 feet of depth in freshwater - 1 ata - Each 33 feet of depth in sea water Describing diving with the acronym SCUBA came from what event? - The development...

Objects under water appear: 1: The same size as they do on land. 2: Twice as large as they do on land. 3: Closer and larger than they do on land. 4: Smaller and farther away than they do on land. - Closer and larger than they do on land. As you descend: 1: Colors appear to fade. 2: Reds and oranges are among the first colors to disappear. 3: At 30 m/99 ft, little color remains other than blues, grays, blacks and whites. 4: All of the above. - All of the above. Which of the following statements i...

Objects under water appear: 1: The same size as they do on land. 2: Twice as large as they do on land. 3: Closer and larger than they do on land. 4: Smaller and farther away than they do on land. ~~> Closer and larger than they do on land. As you descend: 1: Colors appear to fade. 2: Reds and oranges are among the first colors to disappear. 3: At 30 m/99 ft, little color remains other than blues, grays, blacks and whites. 4: All of the above. ~~> All of the above. Which of th...

Objects under water appear: 1: The same size as they do on land. 2: Twice as large as they do on land. 3: Closer and larger than they do on land. 4: Smaller and farther away than they do on land. - Closer and larger than they do on land. As you descend: 1: Colors appear to fade. 2: Reds and oranges are among the first colors to disappear. 3: At 30 m/99 ft, little color remains other than blues, grays, blacks and whites. 4: All of the above. - All of the above. Which of the following st...

Objects under water appear: 1: The same size as they do on land. 2: Twice as large as they do on land. 3: Closer and larger than they do on land. 4: Smaller and farther away than they do on land. - Answer-Closer and larger than they do on land. As you descend: 1: Colors appear to fade. 2: Reds and oranges are among the first colors to disappear. 3: At 30 m/99 ft, little color remains other than blues, grays, blacks and whites. 4: All of the above. - Answer-All of the above. Which o...