Layers of the Earth PPT Study Guide

The Earth's mantle is primarily composed of ______.

• Iron

• Silica

• Nickel

• Magnesium

The crust is the ______ layer of the Earth.

• Innermost

• Outermost

• Middle

• Thickest

Which process is primarily responsible for the movement of tectonic plates?

• Convection Currents

• Seismic Activity

• Ocean Currents

• Atmospheric Pressure

The Earth's layers interact to drive ______.

• Biological Evolution

• Geological Processes

• Climate Change

• Ocean Currents

The Earth's crust is how many kilometers thick?

• 0-100 km

• 100-2900 km

• 2900-5100 km

• 5100-6378 km

The outer core is located at what depth range?

• 0-100 km

• 100-2900 km

• 2900-5100 km

• 5100-6378 km

The ________ includes both the upper and lower mantle.

• A) Lithosphere

• B) Asthenosphere

• C) Mesosphere

• D) Core

Which layer of the Earth is the innermost?

• Crust

• Mantle

• Outer Core

• Inner Core

Which layer is known for being solid and rigid?

• Lithosphere

• Asthenosphere

• Mesosphere

• Core

The thickness of the Earth's crust ranges from 5 to ______ km.

• 10

• 20

• 50

• 100