Oceanography Concepts and Principles

The video tutorial covers the composition and features of ocean water and the ocean floor. It explains the salinity and density of ocean water, factors affecting salinity, and uses the Dead Sea as an example of high salinity. The tutorial also discusses dissolved gases, temperature variations in ocean layers, and key features of the ocean floor, such as continental shelves, abyssal plains, ocean trenches, and mid-ocean ridges.

What is the most common salt found in ocean water?

• Magnesium sulfate

• Calcium carbonate

• Sodium chloride

• Potassium chloride

How does the density of ocean water change with increased salinity?

• Density increases

• Density fluctuates

• Density remains the same

• Density decreases

In which regions is ocean water salinity typically lower?

• In the middle of the ocean

• Where rivers meet the ocean

• In polar regions

• Near the equator

Why is the Dead Sea called 'dead'?

• It has very few living organisms

• It is extremely deep

• It has no water

• It is surrounded by desert

What causes the high buoyancy in the Dead Sea?

• Shallow depth

• Low water temperature

• High salinity

• Strong winds

What is the thermocline?

• A layer with constant temperature

• A layer with fluctuating temperature

• A layer where temperature decreases rapidly

• A layer where temperature increases rapidly

At what depth does the ocean temperature generally stabilize at 5°C or lower?

• 3000 meters

• 2000 meters

• 1000 meters

• 500 meters

What is the continental shelf?

• The deepest part of the ocean

• A steep slope in the ocean

• A flat part of the ocean floor at the edge of a continent

• A mountain range under the ocean

Where are deep ocean trenches typically found?

• Near the continental shelf

• In the middle of tectonic plates

• At convergent boundaries

• At divergent boundaries

What forms at mid-ocean ridges?

• Deep trenches

• Abyssal plains

• Continental shelves

• New oceanic crust