Layers of the Earth Review 2025

What is the uppermost layer of the mantle?

• asthenosphere
• lithosphere
• lower mantle
• inner core

What are two ways that geologists learn about Earth's interior?

• indirect, focused observation
• indirect, random observation
• direct, obtuse observation
• direct, indirect observation

What is the layer that is a dense solid made of metal?

• inner core
• outer core
• mantle
• crust

What is the movement in the mantle when warm magma rises and cool magma fall called?

• heat
• conduction currents
• convection currents
• radiation currents

What is the thinnest (depth) layer of the Earth?

• crust
• mantle
• outer core
• inner core

What is the thickest (depth) layer of the Earth?

• crust
• mantle
• outer core
• inner core

What are the two types of crust?

• deep dish, pan
• oceanic, shifting
• continental, oceanic
• continental, rocky

What are the 4 layers of the Earth?

• crust, mantle, outer core, inner core
• crust, lithosphere, outer core, inner core
• crust, mantle, outer core, middle core
• crust, mantle, asthenosphere, lithosphere

Which layer of the Earth is responsible for generating the Earth's magnetic field?

• crust
• mantle
• outer core
• inner core

What is the primary composition of the Earth's inner core?

• iron and nickel
• silicon and oxygen
• magnesium and iron
• aluminum and calcium