Earth's Spheres and Their Components

The video explains Earth's four spheres: atmosphere, hydrosphere, lithosphere, and biosphere. It details the composition and function of each sphere, emphasizing their interdependence. The atmosphere is crucial for protection and habitability, while the hydrosphere covers water's role and the water cycle. The lithosphere is the Earth's solid surface, and the biosphere encompasses all living organisms and ecosystems.

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

• Biosphere

• Hydrosphere

• Atmosphere

• Astrosphere

What percentage of the atmosphere is made up of nitrogen?

• 0.9%

• 78%

• 21%

• 0.1%

Which layer of the atmosphere is closest to Earth?

• Exosphere

• Mesosphere

• Stratosphere

• Troposphere

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

• 71%

• 90%

• 85%

• 50%

Which form of water is NOT part of the hydrosphere?

• Rivers

• Rocks

• Icebergs

• Clouds

What is the primary role of the lithosphere?

• To protect from solar radiation

• To regulate the water cycle

• To provide air for breathing

• To serve as the land for biological life

Which layer of Earth is NOT part of the lithosphere?

• Outer core

• Inner core

• Mantle

• Crust

Which of the following is NOT a kingdom in the biosphere?

• Plant

• Fungi

• Mineral

• Animal

What is the term for specific systems of plants and animals that work together in different areas?

• Biomes

• Habitats

• Communities

• Ecosystems

Which of the following is NOT considered a living component of the biosphere?

• Rocks

• Plants

• Bacteria

• Insects