SDI Midterm Exam 2024 Scuba AFS 270 Questions with 100% Correct Answers | Verified | Latest Update

1. objects underwater appear and than they do on land: closer and larger 2. As you descend: 1: Colors will remain largely the same. 2: Blues and grays disappear quickly. 3: Dive lights have little effect on apparent color. 4: None of the above.: 4 (none of the above) 3. Water conducts heat away from your body x as fast as air does: 25x 4. When water stratifies itself into layers, according to temperature, the bound- ary between layers is known as a(n) ANS thermocline 5. Which of the following is/are true? 1: Tides can make the water at a particular dive site noticeably deeper or shallower than you may have experienced previously. 2: Tidal currents can be very strong, making diving difficult or even dangerous. 3: Strong tidal currents can have an adverse effect on visibility. 4: All of the above.: 4 (all of the above) 6. Which of the following is/are true? 1: Water conducts heat away from your body ten times faster than air does. 2: Water conducts heat away from your body 25 times faster than air does. 3: Fresh water conducts heat away from your body faster than salt water does. 4: Salt water conducts heat away from your body faster than fresh water does.: 2 (Water conducts heat away from your body 25 times faster than air does)