The World's Oceans

What percentage of Earth's surface do oceans cover?

• 50%

• 60%

• 70%

• 80%

Which of the following is a primary cause of ocean pollution?

• Volcanic eruptions

• Industrial discharges

• Natural erosion

• Deep-sea mining

What is a direct consequence of overfishing on marine ecosystems?

• Increased fish populations

• Disruption of marine food webs

• Enhanced coral reef growth

• Reduced ocean acidity

Are you enjoying the video lesson?

• Yes

• No

How does plastic waste primarily affect marine organisms?

• It enhances their immune systems

• It provides new habitats

• It leads to microplastics ingestion and entanglement

• It increases oxygen levels in the water