Pacific Dead Zones

The video discusses oceanographic research led by Jack Barth, focusing on the use of underwater gliders to measure ocean health indicators like temperature, salinity, and dissolved oxygen. It highlights the issue of ocean dead zones, primarily caused by agricultural runoff and climate change, and the role of technology in advancing ocean research.

What is the primary purpose of the underwater gliders used by Jack Barth?

• To track ocean currents

• To collect data on ocean health

• To map the ocean floor

• To explore deep-sea creatures

What is a major human-induced cause of ocean dead zones?

• Overfishing

• Plastic pollution

• Agricultural runoff

• Oil spills

How do phytoplankton contribute to the formation of dead zones?

• They increase water temperature

• They consume all the oxygen in the water

• They decompose and reduce oxygen levels

• They block sunlight from reaching the ocean floor

What is one way climate change might affect ocean oxygen levels?

• Increasing ocean acidity

• Decreasing oxygen levels in deeper waters

• Raising sea levels

• Increasing ocean salinity

How have smart robots changed our understanding of the oceans?

• By mapping the entire ocean floor

• By offering new insights into oceanic changes

• By predicting weather patterns

• By providing real-time data on fish populations