Ocean Features and Their Functions

The video explores the hydrosphere, covering Earth's water distribution, the role of oceans in human life, oxygen production, carbon absorption, climate control, and economic uses. It highlights the limited availability of freshwater, the importance of phytoplankton, and the oceans' buffering effect on climate change. The video also discusses various landforms near oceans.

What percentage of Earth's water is found in the oceans?

• 97%

• 68.7%

• 71%

• 30.1%

What is the primary reason oceans are not suitable for direct human consumption?

• High temperature

• Lack of nutrients

• High salt content

• Presence of marine life

What percentage of the Earth's water is locked in ice caps and glaciers?

• 30.1%

• 97%

• 68.7%

• 0.9%

Which of the following is a major source of human protein intake?

• Forests

• Mountains

• Rivers

• Oceans

What role do phytoplanktons play in the ocean ecosystem?

• They are primary consumers.

• They produce oxygen through photosynthesis.

• They are predators of small fish.

• They decompose organic matter.

What is the impact of increased CO2 absorption by oceans?

• Oceans become more alkaline

• Oceans become colder

• Oceans become warmer

• Oceans become more acidic

How do oceans help in regulating the Earth's climate?

• By absorbing sunlight and distributing heat

• By blocking sunlight

• By reflecting heat back into space

• By absorbing all the Earth's heat

What is the role of ocean currents in climate regulation?

• They cool down the Earth's surface.

• They increase the Earth's temperature.

• They distribute heat around the globe.

• They prevent storms from forming.

Which landform is a narrow strip of land connecting two larger land masses?

• Strait

• Isthmus

• Bay

• Gulf

Which oceanic feature is partly enclosed by land?

• Peninsula

• Island

• Strait

• Gulf