Understanding Earth's Geography and Seasons

What is the imaginary line called that runs through Earth's center from the North Pole to the South Pole?

• Equator

• Axis

• Meridian

• Tropic

How long does it take for Earth to complete one rotation on its axis?

• 12 hours

• 24 hours

• 365 days

• 30 days

What is the term for Earth's complete trip around the sun?

• Rotation

• Revolution

• Orbit

• Cycle

Which layer of Earth is made up of a solid inner core and an outer core of melted, liquid metal?

• Crust

• Mantle

• Core

• Lithosphere

What is the thick layer of hot, dense rock surrounding Earth's outer core called?

• Crust

• Mantle

• Core

• Lithosphere

Which subsystem of Earth consists of all its water?

• Lithosphere

• Atmosphere

• Hydrosphere

• Biosphere

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

• 29%

• 50%

• 71%

• 90%

What is the term for the shapes that occur on Earth's surface, such as plains and mountains?

• Landforms

• Ecosystems

• Biomes

• Terrains

What is the primary component of Earth's atmosphere?

• Oxygen

• Carbon Dioxide

• Nitrogen

• Argon

At what degree is Earth tilted on its axis?

• 15 degrees

• 23.5 degrees

• 30 degrees

• 45 degrees