A Regulator Equipped With A Conventional Alternate Air Source Second Stage

Question: Objects under water appear:

Answer: Closer and larger than they do on land

Question: What happens to colors under water

Answer: As you descend, colors appear to fade, not intensify. Blues and grays are the last remaining colors at depth.

Question: Because sound travels faster under water:

Answer: Sound’s increases speed under water makes it harder to determine the direction from which it is coming.

Question: Water conducts heat away from your body ___ times faster than air does

Answer: 25

Question: The presence of thermoclines means that

Answer: divers may require more in the way of exposure protection at depth than they will at the surface.

Question: Tides can:

Answer: - make water seem deeper or shallower, stronger and difficult, adverse effect on visibility

Question: Cause of permanent ocean currents

Answer: The sun warming water near the equator, coupled with the earth’s rotation, is the primary cause of permanent ocean currents.

Question: Wave height and length

Answer: Wave height is the distance from its highest point (crest) to its lowest point (trough). Wave length is the distance from crest to crest.

Question: formation of surf

Answer: A wave encountering shallow water begins to slow at its bottom, while the top of the wave continues at its previous speed. This causes the wave to break.

Question: what is surge

Answer: Surge is the back-and-forth movement of water caused by waves passing over head.