Geology Units A, B, C, & D: Earth's Structure & Plate Tectonics

What are the four major layers on the Earth?*

• mantle, crust, core

• mantle, inner core, outer core

• mantle, inner core, outer core, crust

• crust, core, mantle

The Earth's crust has an average thickness of about ______ km.*

Answer explanation

30 km

The very center of the Earth is _______; the outer core is _______.*

• solid; liquid

• liquid; solid

• solid; solid

• liquid; liquid

What is the Earths core made up of?*

Answer explanation

Rock and Metal

Tags

NGSS.MS-PS1-1

The interior of the Earth is heated primarily by _____________ _________.*

Answer explanation

Radioactive Decay

Tags

NGSS.HS-ESS2-3

Convection currents occur in the ____________.*

Answer explanation

Mantle

Tags

NGSS.MS-ESS2-5

NGSS.MS-ESS2-6

Which layer of the earth is made up of liquid iron?*

Answer explanation

Outer core

True or False: Tectonic Plates consist of lithosphere, which is made of crust and upper most mantle.*

Answer explanation

True

Tags

NGSS.MS-ESS2-3

What advancement in technology helped with collecting evidence to support sea-floor spreading?*

Answer explanation

Sonar

Tags

NGSS.MS-ESS2-3

What evidence supported the Theory of Continental Drift?*

Answer explanation

Sea-floor spreading

Tags

NGSS.MS-ESS2-3