Plate Tectonics

The idea that large land masses move across Earth is called _______________.

• Continental Drift

• Earthquakes

• Seafloor Spreading

• The mantle

Which is the topmost layer of Earth?

• The inner core

• The outer core

• The mantle

• The crust

Most mountains form because _____________.

• Of ocean currents

• Plates collide

• Earthquakes shake the ground

• Lava flows

The seafloor spreads because ____________________.

• Magma flows into a gap in the mid ocean ridge

• Earthquakes occur along faults

• Volcanoes erupt

• Plates collide

The thinnest layer of Earth is the _____________.

• Mantle

• Crust

• Inner Core

• Upper Core

The thickest layer of Earth is _______________.

• Mantle

• Crust

• Inner Core

• Upper Core

Where are most mountains, earthquakes and volcanoes located?

• In the middle of continents

• In the middle of plates

• At the boundaries between plates

The presences of the same __________ on several different continents supports the idea of continental drift.

• Fossils

• Rocks

• People

• Plate boundaries

The cycle of heating, rising, and cooling then sinking is called ____________.

• Convergent boundaries

• Convection Currents

• Subduction Zones

Plates that are pushed underneath another plate into the upper mantle is called _______________.

• Convection currents

• subduction zones

• convergent boundaries

• divergent boundaries