Scientific evidence indicates the Earth is ancient - approximately _______ years old.

• 2 hundred
• 4.6 billion
• 52 thousand
• 52,000

Scientific evidence indicates that Earth is composed of four concentric layers, which are...

• Crust, Mantle, Outer Core
• Igneous, Mantle, Outer Core, Inner Core
• Crust, Mantle, Outer Core, Inner Core
• Crust, Mantle, Outer Core, Apple Core

The outer two layers of the Earth are composed primarily of

• Iron
• Nickel
• Pressure
• Rocky Material

The innermost layers of the Earth are composed mostly of

• Iron
• Nickel
• Rocky Material
• Both A and B

Earth is composed of four layers. Many scientists believe that as Earth cooled, the denser materials sank to the center and the less dense materials rose to the top. The least dense layer is the -

• crust
• mantle
• outer core
• inner core

The _____________ is the outer most layer of Earth.

• Crust
• Mantle
• Outer Core
• Inner Core

What layer of the earth is located just below the crust?

• inner core
• mantle
• outer core
• continental shelf

Magma can be found in the __________________.

• Crust
• Mantle
• Outer Core
• Inner Core

The _____________ is located between the inner core and mantle.

• Crust
• Mantle
• Outer Core
• Inner Core

The _____________ is broken in many large and small tectonic plates.

• Crust
• Mantle
• Outer Core
• Inner Core