Earth's Spheres and Their Characteristics

The video tutorial discusses the four main components of Earth's environment: atmosphere, hydrosphere, lithosphere, and biosphere. It explains the characteristics and functions of each sphere, including the layers of the atmosphere, the water bodies in the hydrosphere, the solid crust of the lithosphere, and the life-supporting biosphere. The tutorial emphasizes how these spheres interact to make Earth a habitable planet.

Which of the following is NOT one of the four main spheres of Earth?

• Geosphere

• Biosphere

• Hydrosphere

• Astrosphere

What percentage of the atmosphere is composed of nitrogen?

• 78%

• 21%

• 50%

• 1%

In which layer of the atmosphere do most weather phenomena occur?

• Stratosphere

• Mesosphere

• Troposphere

• Thermosphere

Which layer of the atmosphere is known for being the coldest?

• Troposphere

• Mesosphere

• Thermosphere

• Stratosphere

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

• 71%

• 50%

• 85%

• 60%

Which of the following is NOT a part of the hydrosphere?

• Oceans

• Lakes

• Rivers

• Mountains

What is the average thickness of the lithosphere?

• 150 kilometers

• 200 kilometers

• 50 kilometers

• 100 kilometers

Which of the following is a characteristic of the lithosphere?

• It includes high mountains and deep valleys.

• It is the coldest layer of the atmosphere.

• It is the layer where weather occurs.

• It is composed of gases.

Which sphere is known as the area where organisms live?

• Atmosphere

• Hydrosphere

• Biosphere

• Geosphere

In the example given, which sphere does the river belong to?

• Biosphere

• Geosphere

• Atmosphere

• Hydrosphere