Earth layers Flashcards
What are the layers of the earth?
Crust, Lithosphere, Asthenosphere, mesosphere, outer core, inner core.
What are the three main parts of the earth?
Crust, mantle, core.
What waves arrive first at a seismograph?
P waves because they are faster.
What do S-waves travel through?
Solids, and gasses.
What is the outer core made of?
They are made of liquid.
When do surface waves arrive?
They arrive last to an earthquake.
What are the three major types of rocks?
Igneous, sediment, and metamorphic.
What type of rocks make up the oceanic crust?
It is made of igneous rocks.
Is oceanic crust thinner or thicker than continental?
Thinner than continental.
What crust is denser oceanic or continental?
The oceanic crust is denser.
What is the lithosphere?
It is very brittle.
What is the asthenosphere like?
It has the same consistency as toothpaste.
Where does the lithosphere rest?
It rests on the asthenosphere.
What are the qualities of the lithosphere?
Rigid, solid, brittle.
How deep is the lithosphere?
It is 100 km deep.
What is the crust of the total earth mass?
1%.
How does convection work in the mantle?
The core heats up the mantle and then the other it gets it rises and then it gets cool, and then sinks in the mantle and then repeats.
What are the qualities of P waves?
Primary, faster, goes through solids liquids and gasses, compression wave, longitudinal.
What is the shadow zone of P waves?
105-140.
What are the qualities of S waves?
Secondary, slower, goes through solids and gasses, transverse.
What is the shadow zone of S waves?
105 to 105.
What are radioactive elements?
Uranium, thorium, potassium.
What is the outer core made of?
Made of liquid metal.
What percentages make up the mass of the earth?
crust 1%, mantle 68%, and the core is 31%.
How thick is the mesosphere?
2710 km thick.
Where do diamonds form in the earth?
They form in the upper mantle.
How thick is the crust?
70km.
How thick is the mantle?
It is 2900km.
How thick is the inner core?
2300km.
How thick is the outer core?
1200km.
