SDI FINAL EXAM LATEST 2024-2025 VERSION A, B
AND STUDY GUIDE ALL 300 QUESTIONS AND
CORRECT ANSWERS
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. - CORRECT 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. - CORRECT ANSWER✔✔All of the above.
1
SUCCESS!
,Page 2 of 72
Which of the following statements is true? There may be more than one correct
answer.
1: Water is 400 times denser than air.
2: Water is 800 times denser than air.
3: Sound travels about four times faster underwater.
4: Both the second and the third answer are correct. - CORRECT ANSWER✔✔Both
the second and the third answer are correct.
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. -
CORRECT ANSWER✔✔Water conducts heat away from your body 25 times faster
than air does.
When water stratifies itself into layers, according to temperature, the boundary
between layers is known as a(n):
1: Halocline.
2
SUCCESS!
,Page 3 of 72
2: Ichtyocline.
3: Thermodyne.
4: Thermocline. - CORRECT ANSWER✔✔Thermocline.
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. - CORRECT ANSWER✔✔All of the above.
The sun warming water near the equator, coupled with the earth's rotation, is the
primary cause of permanent ocean currents.
1: True.
2: False. - CORRECT ANSWER✔✔True.
Which of the following is/are true?
3
SUCCESS!
, Page 4 of 72
1: If caught in a rip current, swim directly towards shore, using the most powerful
kick possible.
2: If caught in a rip current, swim perpendicular to shore, until you are completely
out of the rip current, then swim in towards shore.
3: If caught in a rip current, swim parallel to shore, until you are completely out of
the rip current, then swim in towards shore.
4: Don't fight the rip current; relax and let it carry you closer to shore. - CORRECT
ANSWER✔✔If caught in a rip current, swim parallel to shore, until you are
completely out of the rip current, then swim in towards shore.
We measure waves by their height and weight.
1: True.
2: False. - CORRECT ANSWER✔✔False.
Explanation:
We measure waves by their height and length.
Which of the following best describes the formation of surf?
4
SUCCESS!
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Ressy. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $14.99. You're not tied to anything after your purchase.
