A
Do seismic wave that shake the ground also travel through earths interior?
Yes
When do seismic waves change speed and direction?
At boundaries and between different materials
What waves travel through earth solid crust?
P and S waves
What waves travel through mantle?
P waves and S waves
Who realized that s waves do not travel through earths center (name of the profession)?
seismologists
Why do P-waves bend when they hit the Earth's core?
P-waves refract, signaling differences in material properties and composition.
How do seismic waves provide information about Earth's internal structure?
Seismic waves changing paths and speed at material boundaries reveal insights into Earth's internal structure.
What state of matter makes up the upper mantle according to seismic wave studies?
The upper mantle is composed solids.
How are seismic wave images created?
Seismic wave images are created using seismometer and recorded on a seismograph
what role do seismometers play?
visualizing Earth's internal structure, similar to CT scans but using seismic waves instead of X-rays.
What have scientists determined about Earth's regions by comparing seismic wave speed with rock type measurements?
Scientists determined thickness and composition, such as the upper mantle being peridotite.
What changes do seismic waves undergo in the Earth's mantle?
Seismic waves change speed and direction at material boundaries, indicating density and composition variations.
What happens to S-waves generated by an earthquake, and what did this observation reveal about Earth's core?
S-waves do not travel through Earth's center, which shows that the outer core is liquid.
What layers of earth do p-waves travel through
The mantle, outer core and inner core.
What is a shadow zone?
A area in the earths surface where sesimographs cannot detect direct p and s waves from an earthquakes
How do seismic waves contribute to the determination of Earth's internal structure?
Seismic waves help determine composition and structure of Earth's interior.
What about Earth's interior can be located and identified using the data collected from seismic waves?
The locations of each layer--the depth at which they begin and end
What does the speed of seismic waves depend on factors other than depth?
sesimic wave speed depends on composition/material
True or False: earthquakes only occur at transform boundaries
False- they happen at all types of plate boundaries
Which type of wave will be received by a seismometer first?
P-wave
Why do some earthquakes occur at depths of 300km but others occur at more shallow depths of 30 km?
At convergent boundaries, deeper earthquakes occur at subduction zones, where more surface level earthquakes are generated at transform boundaries
In what ways do seismic waves reflect and refract at different boundaries inside Earth?
Seismic waves reflect and refract at material boundaries
How does the seismic wave speed in hotter areas compare to cooler regions, and how does this temperature and what does it shows about seismic wave data?
Seismic waves travel more slowly in hotter areas and more quickly in cooler regions, which shows the temperature variations in the Earth's interior.
At what depth does the outer core begin?
2900 km