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Layers
Layers by Mechanical Properties
Descriptions of Layers
Vocabulary in Plate Tectonics
More About Plate Tectonics
100
What is the outermost layer?
Crust.
100
Where is the lithosphere located?
Both crust and upper mantle.
100
Describe the crust.
The crust is less than 1% of Earth by mass. The two types are oceanic crust and continental crust. It is the outermost layer. It is right under the ocean. Its hard and rigid.
100
A ______________ is the location at which two plates come together.
plate boundary.
100
How much major plates are on the surface of the Earth?
8
200
What is hot and a semi-solid rock layer?
Mantle
200
What are the two divisions of the layers by mechanical properties and spell them?
Asthenosphere and Lithosphere
200
Describe the mantle and name its two divisions.
The mantle is hot, ultramafic rock. It represents about 68% of Earth's mass. It is made up of hot, semi-solid rock. It is below the crust.
200
Name three things the plate tectonics theory explains.
Plate tectonics theory explains why: Earth's geography has changed over time and continues to change today. some places are prone to earthquakes while others are not. certain regions may have deadly, mild, or no volcanic eruptions. mountain ranges are located where they are. many ore deposits are located where they are. living and fossil species of plants and animals are found where they are. some continental margins have a lot of geological activity, and some have none.
200
Explain the three types of plate boundaries and name them.
Plates can move away from each other. They can move toward each other. Finally, they can slide past each other. The three types of plate boundaries are divergent, convergent, and transform.
300
What is the only liquid layer and spell it?
Outer Core
300
Where is the asthenosphere located?
Uppermantle
300
Explain the inner core.
It is extremely hot. It is made up of nickel and iron.It is the center of the Earth.
300
Which layer by mechanical property is broken up into tectonic plates?
Lithosphere
300
Approximately, how much centimeters do the continents move every year?
2 cm.
400
Approximately, how close is the crust to the oceans and continents?
To the oceans it is a few miles. (5 km) To the continents it is 20 miles. (30 km)
400
What is asthenosphere?
It is partially molten upper mantle material and behaves plastically and can flow.
400
What is the outer core?
It is the only liquid layer of the Earth. It is a sea of mostly iron and nickel.
400
Where is the Cascade Range found?
The Cascade Range is found in western north america. Starts in British Columbia in Canada and runs South to Northern California.
400
What kind of plates are earthquakes caused by?
Transform plates.
500
What is the layer that is 3,200 to 3,960 miles below the surface and about 750 miles in diameter?
Inner Core
500
What is lithosphere?
It is composed of both the crust and the portion of the upper mantle and behaves as a brittle, rigid solid.
500
Name all the layers including the mechanical properties' layers. And Spell Them!
crust mantle outer core inner core lithosphere asthenosphere
500
The theory of plate tectonics is what brings together continental drift and seafloor spreading.
Explain plate tectonics.
500
What is plate tectonics? Explain.
The study of these movements and formations by geologists is called Plate Tectonics.