Plate Tectonics

The layers of Earth are the ________.

• hydrosphere, atmosphere, troposphere, outer core and inner core

• stratosphere, ionosphere, troposphere, outer core and inner core

• crust, mantle, outer core and inner core

• tectonic plates, faults, lithosphere and core

The portion of Earth underneath the crust containing the asthenosphere and the mesosphere is the ________

• mantle

• core

• tsunami

• magma

The outer layer of Earth's crust is made up of huge pieces of rock called ________.

• faults

• tectonic plates

• magma

• tsunamis

The borders, or cracks, between tectonic plates are called ________.

• lithospheres

• synclines

• anticlines

• faults

Tectonic plates move due to ________.

• the moon

• tsunamis

• heated currents deep within Earth

• the formation of mountains over time

Scientists use a machine called a(n) ________ to study earthquakes.

• Pangaea

• seismograph

• anticline

• magnitude

Scientists believe that 250 million years ago ________.

• the continents were farther apart

• the continents were underwater

• there was only one active volcano on Earth

• the continents were connected

A tsunami is caused by ________.

• tectonic plates moving underwater

• inactive volcanoes building up pressure

• tectonic plates sinking

• the crust melting into the mantle

The Earth's inner core is made mostly of ________.

• magma

• halite

• iron

• diamond

Over millions of years, folds can ________.

• form mountains and valleys

• cause volcanic eruptions

• become sinkholes

• create new continents