Earthquakes
Igneous Rock Identification
Igneous Rocks
Volcanoes
Tectonic Plates
100
Where do earthquakes occur?
Plate boundaries
100
What are igneous rocks classified by?
Color and texture
100
What are igneous rocks made of?
Lava or magma
100
Where do most volcanoes form?
On plate boundaries
100
Where is new crust created?
Mid ocean ridges
200
What is the point where a earthquake starts called?
The Epicenter
200
What are the 3 color groups for igneous rocks
Light, intermediate and dark
200
What is the difference between intrusive and extrusive
Intrusive is formed under the ground and extrusive is formed on or close to the surface.
200
What volcano would most likely form on divergent boundaries?
Shield volcanos
200
What moves the plates?
Convection cells under the earth in the upper and lower mantle
300
Which wave moves the fastest?
P-Waves
300
What color group is obsidian in? And why?
Light, because it has a high silica content and is composed of minerals that other light colored rocks are made of.
300
What are igneous rocks a mixture of?
Minerals
300
What volcano is abundant around subduction zones?
Composite volcanoes
300
What boundary creates the most earthquakes?
Transform boundaries
400
What is the epicenter called on the surface?
The focus
400
What are some coarse rocks?
Granite, Diorite, gabbro
400
What texture would a intrusive rock have?
Coarse textures
400
What volcano is found on shield volcanoes and along divergent boundaries?
Cinder cone volcanoes
400
What kind of boundary is a mid ocean ridge?
Divergent boundaries
500
What waves move across the ground like ripples on the water?
I-Waves
500
Name a rock that is Porphyritic
Andesite
500
Would a porphyritic rock be intrusive or extrusive?
Both, because it started to form underground then it came up and finished forming
500
What volcanoes is erupts mainly basaltic eruptions
Shield volcano
500
What is responsible for hot spots?
Mantle plumes that come from the core and creates a volcanic hot spot in the middle of a plate
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