Grade 6 Science: Review for Test on Plate Tectonics

Most geologists believe that the movement of Earth's plates is caused by ___.

Geologists obtain indirect evidence about Earth's interior by ___.

The part of the mantle called the ___ is made of soft rock that bends like plastic.

Holes drilled into Earth's crust provide direct evidence about the interior in the form of ___.

Scientists think that convection currents flow in Earth's ___.

A place where 2 plates slip past each other, moving in opposite directions, is known as a ___.

Most geologists rejected Alfred Wegener's idea of continental drift because ___.

Will point X or point Y have the oldest rock?

The process of ___ continually adds new crust to the ocean floor along the mid-ocean ridge.

What did scientists notice when they observed the mid-ocean ridge?

The theory of ___ states that pieces of Earth's lithosphere are in constant, slow motion.

Using data from seismic waves, geologists have learned that Earth's interior is made up of ___.

According to Wegener's hypothesis of continental drift, ___

The place where two plates come together is known as a ___.

The lithosphere is broken into sections called ___ which float on top of the asthenosphere.

How was it found that rocks farther away from the mid-ocean ridge were older than those nearer?

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

Is the rock at Y colder or hotter than the rock at X?

What feature occurs at C?

Heat transfer within a fluid takes place by ___.

A rift valley forms at a ___.

Scientists think that the ___ made of liquid iron, moves to produce Earth's magnetic field.

The ocean floor sinks beneath a deep-ocean trench and back into the mantle in ___.

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

A collision between two pieces of continental crust at a converging boundary produces a ___.

Earth's inner core is ___.

What is Pangea?

Which type of plate boundary occurs at B?

What is the correct order (starting from the surface) of Earth's layers?

What is happening at point A?