here are the answers did you get any right
Quiz answers
1.Alexander the Great.
2.In the first US Divers mail order catalogue, each product was given a letter code. The valves were codes J and K.
3.Swiss mathematician and computer guru Hannes Keller
holds the all-time deepest open water dive record.
He dived to 1000 feet of sea water off California in 1962,
breathing a mixed gas.
The cave diving depth record was held several times by
diving hero and high school mathematics teacher Sheck Exley.
4.No. Biological material is completely incinerated because of the enormous partial pressure of oxygen.
5.In air, there is a slight delay between arrival of a sound at one ear and at the other. In water, sound travels 8 times faster, and the delay is so short as to be imperceptible.
6.m'aider is French for (to) help me.
7.Pan-pan. (Mayday is "we are in grave and imminent danger to life"; pan-pan is "we are in danger"; securite is "there is danger/risk to vessels".)
8.The same as it is at the surface: about 1 kilogram per litre (62 lb/cu ft). Water is practically incompressible at these pressures.
9.The Australian box jellyfish Chironex fleckeri (a.k.a. Sea Wasp, Indringa, Fire Medusa).
10.The Belize Barrier Reef.
11.hyperbaric (Hyperbaric Medicine) means pressures greater than normal; hypobaric means pressures less than normal; alternobaric (Alternobaric Vertigo) refers to alternating or changing pressures; and dysbaric (Dysbaric Osteonecrosis) refers to unwanted or damaging effects of pressure.
12.He is credited with inventing (on paper) the first scuba apparatus.
13.The egg case of some sharks.
14.5500 metres (18,000 feet).
15.Cold-blooded (they do not produce their own body heat).
16.Yes. Fish drown if the oxygen content of the water falls too far. Also, some sharks have to keep swimming in order to circulate water over their gills; if they become entangled they can drown.
17.Yes. Many bony fish have swim bladders which are filled with air and control their buoyancy. If they are dragged up in a net, they can suffer decompression barotrauma.
18.He tasted a pufferfish (the liver and roe), almost succumbing to tetrodotoxin poisoning.
19.Three.
20.Water filters out the longer wavelengths of light (red - yellow) more readily than the shorter wavelengths (blue - violet) so that everything appears more blueish at depth.
21.They provided suicide pills.
In 1962, a U2 spy plane piloted by USAF Major Gary Powers was shot down over the Soviet Union. Powers disobeyed his orders to commit suicide if captured. His suicide pill contained saxitoxin, a lethal neurotoxin found in shellfish.
22.It is arbitrary - there is no physiological reason for choosing 40 metres in particular.
23.There are fish at all depths. In 1960 the crew of the bathyscaphe Trieste saw a sole on the bottom of the Mariana Trench, at a depth of 10933 metres.
24.Halley patented the first practicable diving bell (with a replenishable air supply) in 1690.
25.Expelling its zooxanthellae.
The animals which make up the coral colony normally live in symbiosis with algae called zooxanthellae, which provide most of the animal's energy by photosynthesis. Pigment in the zooxanthellae gives coral its blue or brown colour. Under stress the coral zooids expel their zooxanthellae (or most of them) and consequently lose colour.
26.Mostly argon. Unpolluted dry air at sea level is 78.08% Nitrogen, 20.95% Oxygen, 0.93% Argon, 0.03% Carbon Dioxide, and traces of Ozone and inert gases. Moist air contains 0-4% water vapour, and polluted air contains fractions of a percent of sulphur gases.
27.The American War of Independence. The American submarine Turtle attacked HMS Eagle in New York harbour in 1776. (This is the first authenticated attack by a submarine.)
28The mouth of a sea urchin.
29.Only the dugong and manatee.
30.French physiologist Paul Bert, in 1878.
31.Ten (8 short arms, two long tentacles).
32.Operculum: 1. the hard bony flap covering the gill slits in fish; 2. A plate-like structure on the foot of a gastropod that seals its shell; 3. any lid-like covering.
33.A fathom is 6 feet. A cable's length is 100 fathoms. Ten cables' lengths is one nautical mile. A nautical mile is the length of one minute of longitude at the equator.
34.Nekton and benthos. (Plankton are organisms which drift; nekton are organisms which can swim; benthos live on the bottom).
35.Haldane's pioneering experiments on decompression were performed on goats. Goats are extremely fond of corn, so it was a sign of illness when they could not even be tempted with corn.
36.This is not a particular property of diver's knives. The stainless steel used for making knives is less corrosion-resistant than the stainless steel used for making dishes, plates etc. The composition of stainless steel involves a tradeoff between its resistance to corrosion and its ability to hold a sharp edge.
37.The blue whale, Balaeoptera musculus.
38.Yes for helium, No for oxygen. The oxygen content of body tissues is regulated by the haemoglobin buffer and does not conform to Henry's Law. [Oxygen toxicity occurs when this system is overwhelmed.]