The video explores marine life zones, highlighting their ecological and economic importance. It covers the coastal zone, estuaries, and wetlands, emphasizing their biodiversity and human impact. Tides and the intertidal zone's adaptations are explained, along with barrier islands and coral reefs. The open ocean is divided into zones based on sunlight, and human impacts like ocean acidification are discussed. The video stresses the need for conservation to sustain these ecosystems.

What percentage of marine species are found in the coastal zone?

• About 30%

• About 75%

• About 50%

• About 90%

Which zone is described as having high biodiversity due to nutrient-rich waters?

• Coastal zone

• Euphotic zone

• Abyssal zone

• Bathyal zone

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What is the primary ecological role of estuaries?

• Filter pollutants and provide habitat

• Support deep-sea fishing

• Provide recreational areas

• Act as barriers to storm surges

What causes the formation of tides?

• Wind patterns

• Gravitational pull of the moon and sun

• Ocean currents

• Thermal heating of the ocean

What is a spring tide?

• A tide with the least difference between high and low tide

• A tide occurring only in spring season

• A tide with the greatest difference between high and low tide

• A regular daily tide

Which zone of the open ocean is known for photosynthetic activity due to ample sunlight?

• Pelagic zone

• Abyssal zone

• Bathyal zone

• Euphotic zone

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What is marine snow?

• Ice formations in polar marine waters

• Organic material falling from upper layers of the ocean

• Salt residues left from evaporated seawater

• Microplastics accumulated in the ocean

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What is the main cause of ocean acidification?

• Oil spills

• Overfishing

• Uptake of anthropogenic carbon dioxide

• Natural ocean currents

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How does ocean acidification affect marine life?

• Enhances the growth of coral reefs

• Weakens the shells of shellfish and coral

• Increases oxygen levels in water

• Reduces the salinity of seawater

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Why is it crucial to understand and conserve marine ecosystems?

• To enhance oil extraction processes

• To increase tourism

• To ensure their sustainability for future generations

• To support coastal construction

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