Strangescience: Plate Tectonics Chapter Review

The existence of coal beds in Antarctica indicates that the continent once had  

Wegener’s could not explain how or why Earth’s continents move.

The crust and upper mantle make up Earth's 

The hypothesis that continents have slowly moved to their current locations is called 

These  currents inside Earth might drive plate motion.

The East African Rift is an example of a 

Active volcanoes are most likely to form at  

Matching ____ on different continents are evidence for continental drift. 

Iron particles in rocks aligned in bands because of reversal of 

The boundary between two plates moving together is called a 

Wegener believed that the continents were part of a supercontinent about ____ years ago.

It is  a sensitive device used to detect magnetic fields on the seafloor. 

Plates slide past one another at 

Continents move at a speed of a few centimeters per

Seafloor spreading occurs because 

These  are formed when two continental plates collide. 

Features found at divergent plate boundaries include  

While studying the ocean floor, scientists found ____ bands of magnetism. 

The circulation of material caused by differences in density is called convection. 

The driving forces of tectonic plates are related to convection currents in Earth’s ___ 

 In order to complete a convection current, the rising material must eventually 

 The weight of a subducting plate helps to pull the lithosphere into a subduction zone  

Plates of the lithosphere float on the

Same ____ on several continents supports the hypothesis of continental drift.

This  occurs when one tectonic plate descends beneath another. 

Convection currents in the mantle are caused by  differences in

The youngest rocks on the ocean floor are located  

A fossil plant that helps support the theory of continental drift is 

The Himalayan mountain range of India was formed at a  

The ____ is (are) an example of a transform boundary