Question

question 39
1 pts
what process brings the deep cold ocean currents up to the surface?
○ conduction
○ global wind patterns
○ temperature and salinity
○ upwelling
question 40
1 pts
where would we expect to find the most dense ocean water?
○ in the middle of the atlantic ocean
○ near the equator
○ near the poles
○ in the middle of the pacific ocean

Explanation:

Question 39

To determine the process that brings deep cold ocean currents to the surface, we analyze each option:

• Conduction: Involves heat transfer through direct contact, not related to bringing deep ocean currents to the surface.
• Global Wind Patterns: Influence surface currents, not the upward movement of deep currents.
• Temperature and Salinity: Affect ocean water density and drive thermohaline circulation, but not the direct process of bringing deep currents to the surface.
• Upwelling: By definition, is the process where deep, cold, nutrient - rich water is brought to the ocean's surface, often due to wind - driven forces that move surface water away, allowing deeper water to rise.

Ocean water density is affected by temperature and salinity (thermohaline factors).

• Water near the poles is very cold. Cold water is denser than warm water. Also, in polar regions, sea ice formation can increase salinity (as ice forms, salt is left behind), further increasing density.
• Water in the middle of the Atlantic or Pacific Oceans and near the equator is relatively warmer. Warmer water is less dense, and near - equator water is typically warm and has lower salinity compared to polar regions in terms of density - driving factors. So the most dense ocean water is expected near the poles.

Answer:

D. Upwelling

Question 40