Plate Tectonics (Chapter 18) Flashcards
State two ways in which continental crust and oceanic crust are different
- Position compared to the Ocean
Continental mostly above the ocean
Oceanic is mostly below the ocean - What rock makes up the crust (composition of crust)
Continental is made of granite
Oceanic is made of basalt
What are the three types of plate boundaries?
Convergent, Divergent, Conservative
What is a convergent plate boundary? (Give me the special Word to describe the movement of the plates.)
When oceanic plate goes below continental plate (subduction)
What is the Effect of a convergent plate boundary? (give Special name)
Destructive - old crust (Oceanic plate) is destroyed
What will happen at a convergent boudary?
Earthquakes and strato - volcanoes
What is a Divergent Plate Boundary? (Give me the special Word to describe the movement of the plates.)
when two plates spread in opposite ways
What is the effect of Divergent Plate Boundary?(special name)
Constructive - new crust created A crust factory.
what will happen at a Divergent Plate Boundary?
Earthquakes and shield volcanoes
what is a conservative plate boundary?
The plates slide sideways by each other
what is the effect of conservative plate boundary?
Crust neither created nor destroyed
what will happen at a conservative plate boundary?
Earthquakes only
what are the two types of crusts?
Oceanic, and continental
what is the term (word) for any natural event that threatens people and property?
Natural Disaster