Structure & Movement of Earth's Layer Flashcards
What are the two types of seismic waves?
Body and Surface Waves
What are the two types of body waves?
P-Waves and S-Waves
What produces seismic waves?
Earthquakes
Which body wave is the fastest?
P-Waves
Which seismic wave can travel to the mantle, not the outer core?
S-wave
Which seismic wave only travel on the earth surface?
Surface Waves
Which seismic wave refracts and cannot penetrate the core?
S-waves
Which seismic can penetrate the core but refracts?
P-waves
How can we study earthquake waves in order to obtain useful information regarding the composition of the interior of the earth?
Earthquake waves travel at different rates through different materials allowing scientists to study the different layers.
Which one cases the most damage?
Surface waves
Which one will arrive first?
P-waves
P-waves travel fastest through which layer?
Inner core (Densest Layer)
The theory that the outer core is liquid is best supported by what evidence?
S-waves do not pass through it and P-waves refract.
Which type of wave can penetrate the outer and inner core?
P-waves
What are the layers of the Earth?
- the crust
- the mantle
- the outer core
- the inner core
Which is the hottest layer?
Inner Core
What keeps the lithosphere from melting?
Cooler Temperatures
What property distinguishes the earth’s Crust,mantle, and core?
Composition
What are two types of the Earth’s Crust?
Continental and Oceanic
Compare the thickness of the Earths crust under oceans versus under mountain ranges.
Oceanic crust is thinner than Continental Crust.
Which is more dense? Oceanic or Continental?
Oceanic
What 3 properties increase as you move closer to the center of Earth?
- Pressure
- Temperature
- Density
The theory of sea-floor spreading supports ideas that new crust is being formed along mid-ocean….
RIDGES
What are convection currents?
Molten rock is heated and rises then cools and falls as this process repeats again. This motion causes plated move apart.
