Earth and Its Formation Quiz

How long ago did the Earth form?

• 4.6 billion years ago

• 3.2 billion years ago

• 1 billion years ago

• 2.5 billion years ago

What is the 'Great Oxygenation Event'?

• The formation of the continents

• A volcanic eruption

• The emergence of oxygen-producing organisms

• A time when Earth was completely frozen

What is the thickness of the oceanic crust?

• 100 km

• 6-12 km

• 30-70 km

• 20 km

Who proposed the idea of a supercontinent called 'Pangaea'?

• Galileo Galilei

• Isaac Newton

• Alfred Wegener

• Charles Darwin

What is the main composition of the outer core?

• Granite

• Magma

• Liquid iron-nickel alloy

• Solid iron

What type of boundary occurs when two tectonic plates slide past each other?

• Transform boundary

• Static boundary

• Convergent boundary

• Divergent boundary

What was the early atmosphere of Earth primarily composed of?

• Carbon dioxide and water vapor

• Methane and ammonia

• Oxygen and nitrogen

• Helium and hydrogen

What is the thickness of the entire mantle?

• 3,500 km

• 640 km

• 2,900 km

• 1,200 km

What process released gases into the early atmosphere?

• Photosynthesis

• Volcanic outgassing

• Evaporation

• Condensation

What is the main feature of divergent boundaries?

• Mountains are formed

• Plates collide

• Plates move apart

• Volcanic eruptions occur