Earth's Four Major Spheres Quiz

What is the primary gas in the Earth's atmosphere?

• Nitrogen

• Oxygen

• Argon

• Carbon Dioxide

Which layer of the Earth is composed of solid rocks and minerals?

• Atmosphere

• Biosphere

• Lithosphere

• Hydrosphere

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

• 90%

• 50%

• 71%

• 80%

Which sphere includes all living organisms on Earth?

• Atmosphere

• Lithosphere

• Hydrosphere

• Biosphere

What is the main component of the Earth's crust?

• Magnesium

• Iron

• Silicon

• Oxygen

What is the state of the outer core of the Earth?

• Solid

• Liquid

• Plasma

• Gas

Which process is responsible for the movement of tectonic plates?

• Photosynthesis

• Convection currents

• Evaporation

• Decomposition

What is the primary role of the hydrosphere?

• Provides oxygen

• Supports life

• Regulates temperature

• Contains minerals

Which layer of the Earth is involved in the formation of mountains?

• Crust

• Outer Core

• Inner Core

• Mantle

What is the thickness of the oceanic crust?

• 20-30 km

• 10-20 km

• 30-70 km

• 5-10 km