Advanced Snorkelling Skills

Question 1

pressure

Answer 1

The force of pushing on an object due to the weight of the water above.

Question 2

Units for Pressure

Answer 2

ATA or Atmospheres

Question 3

Pressure and density relationship

Answer 3

Pressure increases with the increase of depth, it is a verse relationship.

Question 4

What is the atmosphere level on sea level

Answer 4

1ATA

Question 5

Density

Answer 5

The degree of the compactness of a substance

Question 6

what happens to the density of the air inside your body with the increase of depth

Answer 6

It increases as the air is compressed with the high pressure from the decent and can cause barotraumas.

Question 7

presser calculation

Answer 7

depth(m)/10 +1

Question 8

calculating depth

Answer 8

pressure(ATA)-1x 10

Question 9

Boyles law

Answer 9

Pressure and volume of a gas have an inverse
(opposite) relationship. One gets bigger when the other gets smaller.

Question 10

List all internal air spaces.

Answer 10

Lungs, ears, teeth, stomach, mask, sinuses.

Question 11

Barotraumas

Answer 11

Injury to your body due to a change in pressure.

Question 12

baron and trauma meanings

Answer 12

baro: pressure
trauma: injury to the body

Question 13

How do barotraumas occur

Answer 13

When you fail to equalise the pressure inside you with the air outside.

Question 14

Descent barotrauma is called

Answer 14

squeezes

Question 15

Ascent barotrauma is called

Answer 15

reverse squeeze

Question 16

Purpose of a wetsuit

Answer 16

Warmth, protection against exposing skin, buoyancy.

Question 17

three affects of light that affect a snorkeller’s sight.

Answer 17

refraction
reflection
absorption.

Question 18

what can light be reflected by

Answer 18

sand, plankton

Question 19

what do divers use to overcome a lack of light and bring back colour

Answer 19

a torch you dumb shit.

Question 20

light absorption

Answer 20

light is absorbed and converted into energy

Question 21

what colour is absorbed first and what one is absorbed last

Answer 21

first: red
last: blue

Question 22

what speed does sound travel through water

Answer 22

1500m/s

Question 23

how much faster does sound travel in water compared to air

Answer 23

4.3 times faster

Question 24

buoyancy

Answer 24

the ability or tendency for something to float in fluids.

Question 25

three types of buoyancy

Answer 25

negative buoyancy(going down) neutral buoyancy(going foreward) positive buoyancy(going up)

Question 26

reflection

Answer 26

the rebound of light off of a body or surface

Question 27

refraction

Answer 27

when light from air travels to water and causes a bend

Question 28

absorption

Answer 28

a process where light is absorped and converted to energy changing he colour appearence

Question 29

sound

Answer 29

the movement of energy in waves through a medium

Question 30

ear barotrauma

Answer 30

discomfort or pain in the ears due to pressure differences between the inside and outside of the eardrum.

Question 31

mask squeeze

Answer 31

when mask compresses and stick to the divers face due to pressure

Question 32

lung over expansion

Answer 32

occurs when air trapped in lungs expands during an ascent potentially causing lung rupture.