2.2 | Layers of the Earth

What is the name of the first layer of the Earth that we live on?

• Mantle

• Crust

• Outer Core

• Inner Core

How thick is the Earth's mantle?

• 1,800 miles

• 750 miles

• 40,230 feet

• 50 miles

What is the main composition of the Earth's outer core?

• Dense ball of iron

• Solid rock

• Mixture of rocks and minerals

• Molten liquid metal

Tags

NGSS.MS-PS1-1

Why is the inner core solid despite its high temperature?

• It is made of liquid metal

• It is made of solid rock

• It is under immense pressure

• It is cooler than the outer core

Tags

NGSS.HS-ESS2-3

What is the main reason the Kola Superdeep Borehole stopped digging deeper?

• Reached the inner core

• Lack of interest

• High temperatures

• Lack of funding

Which layer of the Earth is the thickest?

• Inner Core

• Outer Core

• Mantle

• Crust

What is the temperature range of the Earth's outer core?

• 7,000 degrees Fahrenheit

• 9,000 degrees Fahrenheit

• 1,000 degrees Fahrenheit

• 10,000 degrees Fahrenheit

Tags

NGSS.HS-ESS2-3

What method do scientists use to study Earth's inner layers without digging?

• Using telescopes

• Using data from earthquakes

• Using submarines

• Using satellites

What is the main challenge in exploring the Earth's inner layers?

• Lack of funding

• Lack of interest

• High temperatures and pressure

• Lack of technology

What is the approximate depth reached by the Kola Superdeep Borehole?

• 1,800 miles

• 50 miles

• 25 miles

• 8 miles