Exploring Earth's Layers

How long ago is the Earth believed to have formed?

• 3.5 billion years ago

• 4.6 billion years ago

• 5.2 billion years ago

• 6.1 billion years ago

Tags

NGSS.HS-ESS1-6

What process causes denser materials to separate from less dense materials on Earth?

• Seismic activity

• Tectonic shifting

• Volcanic eruption

• Planetary differentiation

What type of waves are released by earthquakes and help us understand Earth's interior?

• Light waves

• Sound waves

• Radio waves

• Seismic waves

Which layer of the Earth is the thinnest?

• Inner core

• Crust

• Mantle

• Outer core

What is the primary composition of the Earth's crust?

• Silicon and oxygen

• Iron and nickel

• Magnesium and aluminum

• Carbon and hydrogen

Which type of crust is thicker but less dense?

• Oceanic crust

• Continental crust

• Mantle crust

• Core crust

What is the largest layer of the Earth?

• Outer core

• Crust

• Inner core

• Mantle

What process in the mantle causes rocks to slowly rise?

• Diffusion

• Radiation

• Convection

• Conduction

Tags

NGSS.MS-ESS2-2

What generates Earth's magnetic field?

• The mantle

• The outer core

• The crust

• The inner core

What is the inner core primarily composed of?

• Silicon and oxygen

• Iron and nickel

• Carbon and hydrogen

• Magnesium and aluminum

Tags

NGSS.MS-PS1-1