EARTH STRUCTURE /PLATE TECTONICS

What is the thinnest layer of the Earth?

• Mantle

• Core

• Crust

Your feet are on

• The Crust

• The Mantle

• The Core

Earthquakes takes place on

• The Crust

• The Mantle

• The Core

The thickest layer of the Earth is

• The Crust

• The Mantle

• The Core

It is made up of semi molten rock

• Core

• Crust

• Mantle

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

In sea-floor spreading, molten material rises from the mantle and erupts

• Along the edges of all the continents.

• Along mid-ocean ridges.

• In deep-ocean trenches.

• At the north and south poles.

Most geologists think that the movement of Earth’s plates is caused by _______

• convection. current

• continental drift.

• subduction. zones

• conduction

The geological theory of _______ states that pieces of Earth’s lithosphere are in constant, slow motion.

• subduction

• plate tectonics

• deep-ocean trenches

• sea-floor spreading

Scientists think that convection currents flow in Earth’s___________

• continents.

• mantle.

• lithosphere.

• inner core.