Tectonic Plates

Holes drilled several kilometers into Earth’s crust provide direct evidence about Earth’s interior in the form of _______

• seismic waves

• rock samples

• liquid iron

• volcanic eruption.

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

Earth’s inner core is _______.

• a dense ball of solid metal.

• a layer of molten metal.

• a layer of hot rock..

• a layer of rock that forms Earth’s outer skin

Heat transfer within a fluid takes place by _______

• convection currents

• .radiation

• .conduction.

• density.

According to Wegener’s hypothesis of continental drift, _______

• Earth’s surface is made up of seven major landmasses.

• the continents do not move.

• Earth is slowly cooling and shrinking.

• the continents were once joined together in a single landmass.

What is Pangaea?

• the name of a German scientist

• the name of the supercontinent that existed millions of years ago

• another name for continental drift

• the name of an ancient fossil

Which type of evidence was NOT used by Alfred Wegener to support his continental drift hypothesis

• evidence from landforms

• evidence from fossils

• evidence from human remains

• evidence from climate

Most geologists rejected Alfred Wegener’s idea of continental drift because _______

• they were afraid of a new idea.

• Wegener was interested in what Earth was like millions of years ago.

• Wegener used several different types of evidence to support his hypothesis.

• Wegener could not identify a force that could move the continents.

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.

The process by which the ocean floor sinks beneath a deep-ocean trench and back into the mantle is known as _______

• convection.

• continental drift.

• subduction.

• conduction.