Earth's Layers Science

What is the outermost layer of the Earth?

• Mantle

• Crust

• Inner Core

• Outer Core

Which layer of the Earth is said to be the largest, making up 84% of the Earth's total volume?

• A) Crust

• B) Mantle

• C) Outer Core

• D) Inner Core

The outer core is made up of liquid iron and nickel and is about 2,300 kilometers thick. What is its role?

• Supports life

• Responsible for Earth's magnetic field

• Provides nutrients

• Causes earthquakes

What is the densest layer of the Earth's interior?

• A) Crust

• B) Mantle

• C) Outer Core

• D) Inner Core

The layer where most earthquakes happen is called the ____.

• Oceanic Crust

• Continental Crust

• Inner Core

• Outer Core

Tags

NGSS.MS-ESS3-2

Which crust is thinner, the oceanic crust or the continental crust?

• Oceanic Crust

• Continental Crust

Trenches are long and narrow depressions on the seafloor. What forms them?

• A) Volcanic eruptions

• B) Ocean plates pushing or subducting beneath the continental plates

• C) Earthquakes

• D) Tidal waves

Tags

NGSS.MS-ESS2-3

Ridges are huge chains of mountains circling the ocean floor. How are they formed?

• By erosion

• By volcanic eruptions

• By sedimentation

• By tectonic plate collision

Tags

NGSS.MS-ESS2-3

What is the lithosphere?

• A) The liquid outer core

• B) The brittle crust and the top part of the upper mantle

• C) The dense inner core

• D) The fluid asthenosphere

Tags

NGSS.MS-ESS2-3

The Mohorovicic Discontinuity, or Moho, is the boundary that separates the crust from the ____.

• Inner Core

• Outer Core

• Mantle

• Lithosphere