Seismic Waves
Seismic waves are recorded on a?
seismograph
A hypothetical supercontinent that includes all current land masses. The idea was developed by Alfred Wegener
Pangaea
Volcanic eruptions, tsunamis, and earthquakes occur when __________ move.
Tectonic plates
The Earth's crust is made up of many pieces, known as?
tectonic plates
How are P and S waves recorded?
On a seismograph
The slow movement of the continents across the Earth's surface over time.
continental drift
What is a tsunami?
A massive wave
What causes the plates to move?
convective flow
What are P waves?
Primary waves that travel fast through solids and liquids
A person who studies the solid and liquid matter that constitutes the Earth
Geologist
Where would a tsunami most likely occur?
Any coastal land (land that is directly by water)
When two lithospheric plates slide toward each other
convergent boundary
What are S waves?
Secondary waves, slower than primary waves
Who was Alfred Wegener and describe his theory of Pangaea.
Alfred Wegener was a German scientist and he thought that at one point in time all of the continents were together to form a supercontinent called Pangaea that overtime drifted apart.
What other geological events can occur after an earthquake?
Tsunamis and volcanic eruptions
The rigid outer part of the Earth. It is the crust and upper mantle of the Earth
lithosphere
Mass per unit volume of a substance
density
What evidence did Alfred Wegener have to support his theory?
He saw that some of the continents fit together like a jigsaw puzzle. There was also similar rocks and fossils on separate continents.
In the Pacific Ocean where a large number of earthquakes and volcanic eruptions occur
Ring of Fire
What occurs when the plates move toward each other, and one sinks under the other
ocean trench