Biosphere and Its Interactions

The video explains the biosphere as the only sphere containing living organisms, extending from 8-10 km above sea level to a few meters below the soil. Life exists at various depths in water, up to 3 km below the surface. The biosphere interacts with the lithosphere, hydrosphere, and atmosphere. Humans and bacteria are examples of organisms interacting with these spheres. The majority of life forms exist in the biosphere, as the other spheres are non-living.

What is unique about the biosphere compared to other spheres?

• It is the only sphere with living organisms.

• It contains all the water on Earth.

• It is the hottest part of the Earth.

• It is the largest sphere.

How far below the soil does the biosphere extend?

• Fifty meters

• One kilometer

• Ten kilometers

• A few meters

Up to what depth can life exist in water within the biosphere?

• One kilometer

• Five kilometers

• Three kilometers

• Ten kilometers

Which sphere provides air for humans to breathe?

• Lithosphere

• Biosphere

• Hydrosphere

• Atmosphere

What do bacteria in the soil absorb from the atmosphere?

• Oxygen

• Carbon dioxide

• Nitrogen

• Hydrogen

Which sphere do humans interact with when planting crops?

• Biosphere

• Atmosphere

• Lithosphere

• Hydrosphere

What is the main interaction between the biosphere and the hydrosphere?

• Providing nutrients

• Providing soil

• Providing water

• Providing air

Which sphere is primarily non-living?

• All of the above

• Biosphere

• Atmosphere

• Lithosphere

Where do the majority of life forms exist?

• Lithosphere

• Atmosphere

• Hydrosphere

• Biosphere