PADI The Aquatic Environment 2

Question 1

What causes tidal patterns in the ocean?

Accepted Answer

The gravitational pull of the moon and sun

Answer

Tides are primarily caused by the gravitational forces exerted by the moon and, to a lesser extent, the sun on Earth's oceans.

Question 2

Which type of current is created when dense, cold water sinks and displaces warmer water upward?

Accepted Answer

Convection current

Answer

Convection currents form when temperature differences cause denser cold water to sink, displacing lighter warm water upward in a circulatory pattern.

Question 3

What is the primary hazard of diving in areas with kelp forests?

Accepted Answer

Kelp can entangle divers and restrict movement

Answer

Kelp fronds can entangle equipment or limbs, so divers should move slowly and deliberately, and know how to escape entanglement by rolling or backing out.

Question 4

A halocline is a layer in the water column characterized by a rapid change in:

Accepted Answer

Salinity

Answer

A halocline is a distinct layer where salinity changes sharply with depth, often creating a visual blurring effect that divers can observe at the boundary.

Question 5

Which wave characteristic describes the horizontal distance between two successive wave crests?

Accepted Answer

Wave wavelength

Answer

Wavelength is the horizontal distance measured from one wave crest to the next successive crest.

PADI - Professional Association of Diving Instructors Practice Test

PADI - Professional Association of Diving Instructors Practice Test

PADI The Aquatic Environment 2