Chapter 3

Which method provides the most direct evidence about the Earth’s interior?

• Earthquake seismic waves

• Volcanic eruptions

• Deep drilling projects

• Meteorite analysis

Which of the following is the correct order of Earth’s layers from the surface to the center?

• Crust → Mantle → Outer Core → Inner Core

• Crust → Outer Core → Mantle → Inner Core

• Mantle → Crust → Outer Core → Inner Core

• Crust → Mantle → Inner Core → Outer Core

The average thickness of the continental crust is about

• 30 Km

• 100 Km

• 60 Km

• 10 Km

Which element is most abundant in the Earth’s crust?

• Silicon
• Iron
• Aluminum
• Oxygen

Which of the following statements about Earth’s crust is correct?

• Continental crust is thinner than oceanic crust

• Oceanic crust is thicker than continental crust

• Continental crust is thicker and less dense than oceanic crust

• Oceanic crust is thicker and less dense than continental crust

How many types of earthquake?

• Three types of earthquake.
• Five types of earthquake.
• Four types of earthquake.
• Two types of earthquake.

Which seismic waves cannot pass through liquid?

• P-waves (Primary)

• S-waves (Secondary)

• L-waves (Love waves)

• Rayleigh waves

What is the capital city of Iraq?

• Tehran
• Damascus
• Baghdad
• Ankara

Iraq is often called the “land between two rivers.” Which rivers are these?

• Nile and Amazon
• Ganges and Indus
• Mississippi and Missouri
• Tigris and Euphrates

Iraq’s main export product is

• agriculture
• electronics
• oil
• textiles