Earth's Hydrosphere and Biosphere Concepts

This video concludes the discussion on Earth's system by exploring the hydrosphere, cryosphere, and biosphere. It covers the distribution of water on Earth, the role of glaciers in sea level changes, and the importance of the biosphere in the carbon cycle and ecosystem interactions. The video highlights the unique characteristics of Earth as a water planet and the current challenges faced by glaciers due to climate change.

What percentage of Earth's surface is covered by water?

• 85%

• 71%

• 50%

• 97%

Which process is responsible for the origin of Earth's hydrosphere?

• Volcanic outgassing

• Erosion

• Photosynthesis

• Sedimentation

What is the largest reservoir of Earth's hydrosphere?

• Glaciers

• Oceans

• Rivers

• Lakes

What percentage of Earth's hydrosphere is fresh water?

• 1%

• 2.8%

• 30%

• 10%

What drives the formation of surface currents in the ocean?

• Salinity

• Temperature and winds

• Tides

• Earth's rotation

What causes the deep ocean currents to move?

• Tides

• Earthquakes

• Salinity and temperature differences

• Wind

Where is most of the Earth's ice found?

• Greenland and Antarctica

• The Himalayas

• The Arctic Ocean

• The Andes

What is the potential sea level rise if the Greenland ice sheet melts completely?

• 7 meters

• 5 meters

• 2 meters

• 10 meters

What is the primary role of the biosphere in Earth's systems?

• Driving tectonic movements

• Causing volcanic eruptions

• Producing food and filtering pollution

• Regulating ocean currents

Which sphere includes all living organisms on Earth?

• Lithosphere

• Biosphere

• Cryosphere

• Hydrosphere