Coral Bleaching and Ocean Warming

The video discusses ocean warming, highlighting its uneven impact globally, particularly near the Arctic. It explains how increased greenhouse gases, like carbon dioxide and methane, contribute to rising ocean temperatures and sea levels. The video also covers the concept of ocean heat lag and its long-term effects. It details the impact on marine species, including habitat loss, metabolic changes, and coral bleaching, emphasizing the importance of understanding these changes.

What is the primary reason for the uneven warming of oceans across the globe?

• Differences in salinity

• Human activities

• Variations in ocean currents

• Presence of marine life

What is thermal expansion in the context of ocean warming?

• The decrease in ocean volume due to ice formation

• The decrease in ocean volume due to water cooling

• The increase in ocean volume due to water heating

• The increase in ocean volume due to ice melting

How have greenhouse gases contributed to ocean warming?

• By increasing the salinity of the oceans

• By reducing the ocean's surface area

• By decreasing the ocean's ability to absorb sunlight

• By trapping excess heat in the atmosphere

What is ocean heat lag?

• The time it takes for ocean heat to affect land temperatures

• The time it takes for ocean temperatures to stabilize

• The delay in ocean currents reaching the poles

• The delay in heat absorption by the oceans

What are the two main contributors to rising sea levels?

• Increased evaporation and cloud formation

• Thermal expansion and melting ice sheets

• Volcanic activity and tectonic shifts

• Increased rainfall and river flow

How does ocean warming affect marine species' habitats?

• By stabilizing ocean temperatures

• By creating new breeding grounds

• By reducing sea ice and altering coastlines

• By increasing the availability of food

What role do phytoplankton play in the ocean ecosystem?

• They are the primary predators in the ocean

• They increase ocean salinity

• They provide half of the atmospheric oxygen

• They are responsible for ocean currents

What happens to corals during a bleaching event?

• They grow faster

• They expel the algae living in them

• They become more resistant to temperature changes

• They change color to attract more fish

What is the symbiotic relationship between corals and algae?

• Algae provide food for corals

• Corals provide food for algae

• Algae provide structure for corals

• Corals and algae compete for resources

Under what conditions can corals survive a bleaching event?

• If the temperature increase is permanent

• If the corals are relocated to cooler waters

• If the temperature increase is brief

• If the algae are replaced by other organisms