Earth in Our Solar System

What is the third planet from the Sun?

• Jupiter

• Earth

• Venus

• Mars

What is the primary component of Earth's atmosphere?

• Oxygen

• Nitrogen

• Argon

• Carbon Dioxide

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

• 24 hours

• 12 hours

• 36 hours

• 48 hours

What is the name of the layer of gases surrounding Earth?

• exosphere

• troposphere

• atmosphere

• stratosphere

Which force keeps the Earth in orbit around the Sun?

• Magnetic force

• Centrifugal force

• Gravitational force

• Frictional force

What is the approximate age of the Earth in years?

• 1 billion years

• 6 billion years

• 4.5 billion years

• 3 billion years

What is the largest land biome on Earth?

• Tropical Rainforest

• Desert

• Savanna

• Taiga (Boreal Forest)

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

• 85%

• 71%

• 50%

• 30%

What is the name of the phenomenon that causes day and night?

• Earth's rotation

• Moon's phases

• Earth's orbit

• Sun's position

Which planet is known as the 'Blue Planet'?

• Jupiter

• Earth

• Mars

• Venus