How many water masses are common in tropical and temperate ...

[SGallaher96]

How many water masses are common in tropical and temperate latitudes?
  a. Three
  b. Four
  c. Five
  d. Six

Question 2

What is the name for slow, deep currents beneath the pycnocline?
  a. Surface currents
  b. Convection currents
  c. Thermohaline currents
  d. Polar currents

[ntsoane kedibone]

Answer to Question 1

ANS: C
The water masses present in temperate and tropical waters are named for their relative positions in the
water column. These water masses are surface water, central water, intermediate, deep water, and
bottom water. Information can be found in the section Thermohaline Circulation Affects All the
Ocean's Water.

Answer to Question 2

ANS: C
Thermohaline currents are dependent on density differences which stem from temperature and salinity
variations. These and surface currents have large impacts on Earth's temperature, climate and
biological activity. Information can be found in the section Mass Flow of Ocean Water Is Driven by
Wind and Gravity.