Earth's Layers

The core is made-up of what two elements?

• iron and nickel
• iron and oxygen
• nickel and silicon
• oxygen and silicon

The solid, outer layer of the Earth that consists of the crust and the rigid upper part of the mantle

• Lithosphere
• Mesosphere
• Mantle
• Crust

Pressure ______________________ as you go deeper into the Earth

• increases
• decreases 
• goes up or down depending on the layer
• stays the same

What are the two kinds of crust that the Earth has?

• Oceanic and Crustatious Crust
• Oceanic and Continental Crust
• Optic and Continental Crust

What describes the outer core?

• solid
• liquid
• viscous
• gas

What is the correct order (starting from the surface) of Earth's layers?

• crust, outer core, inner core, mantle
• mantle, outer core, inner core, crust
• crust, mantle, outer core, inner core
• outer core, inner core, crust, mantle

Sediments building up over time, creating layers

• igneous Rocks
• Deposition
• Lithification
• Index fossils

What is an index fossil?

• a fossil found only in a specific time period
• a fossil found across many time periods
• When only one fossil is found among thousands of others

Where are the youngest layers of rock located in a land formation?

• In the middle
• At the bottom
• At the top
• The one with the fossils

Law of Superposition

• In any rock formation, the youngest layer is on the bottom and the oldest is on the top
• In any rock formations, the youngest layer is on the top and the oldest is on the bottom