Layers of the Earth

Front

What are the four main layers of the Earth?

Back

The four main layers of the Earth are the crust, mantle, outer core, and inner core.

Front

What is the outermost layer of the Earth called?

Back

The outermost layer of the Earth is called the crust.

Front

What is the composition of the Earth's mantle?

Back

The Earth's mantle is composed primarily of silicate rocks that are rich in magnesium and iron.

Front

What is the state of matter of the outer core?

Back

The outer core is in a liquid state, composed mainly of molten iron and nickel.

Tags

NGSS.MS-PS1-4

Front

What is the inner core of the Earth primarily made of?

Back

The inner core is primarily made of solid iron and nickel.

Tags

NGSS.MS-PS1-1

Front

How thick is the Earth's crust on average?

Back

The Earth's crust is about 5 to 70 kilometers thick, depending on whether it is oceanic or continental crust.

Front

What geological process occurs in the mantle?

Back

Convection currents occur in the mantle, driving plate tectonics.

Front

What is the significance of convection currents in the mantle?

Back

Convection currents in the mantle are significant because they help to move tectonic plates and cause geological activity such as earthquakes and volcanic eruptions.

Tags

NGSS.HS-ESS2-1

NGSS.HS-ESS2-3

Front

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

Back

The temperature of the Earth's inner core is estimated to be between 4,000 to 5,500 degrees Celsius.

Front

What is the difference between the outer core and the inner core?

Back

The outer core is liquid, while the inner core is solid.

Tags

NGSS.HS-ESS2-3