Show map of Earth’s fault lines/tectonic plates.
continents rest on massive slabs of rock called tectonic plates.
plates are constantly moving around, sliding past one another, going over and
under, and pulling apart.
Move plates around the graphic slightly.
breaks and cracks where these plates separate are called faults.
Highlight fault lines.
two or more plates make contact while moving along their faults, it puts stress
on rocks on both sides, which build up energy that is then released in the form
of massive vibrations called tremors. We feel these tremors as the ground
shaking beneath our feet – an earthquake!
Brief, yet engaging footage of an earthquake.
right? For cities that lie on or near fault lines, earthquakes are one of the
top concerns. In order to guarantee the safety of their citizens, these cities
make it a priority to know when and where an earthquake will strike, as well as
how strong it will be. But how can they detect that?
Scientists monitoring a seismograph/using
called seismologists, who specialize in studying earthquakes and the movements
of tectonic plates, track earthquakes in order to establish where faults lie.
To do this, they use a tool called a seismograph, a machine that picks up
vibrations in the ground and draws them on a sheet of paper. Where the
vibrations are stronger, the closer they are to the fault. With this data and
the assistance of cartographers, people who use special tools and equipment to
make maps, seismologists are able to make an accurate map of the Earth’s
plates, where they lie, and where their faults are located.
Back to the first map
these maps and the information they provide, seismologists can predict the
location of the epicenter, the point directly over an earthquake, and issue a
warning to the cities that sit at or near this location. This information is
especially important for cities that sit in an area called the Ring of Fire.
Highlight the fault that makes the Ring of Fire.
Ring of Fire is an area around the Pacific Ocean where a large number of
earthquakes and volcanic eruptions occur. The Ring of Fire is a geographical
event caused by the shifting of seven different tectonic plates colliding
together along their faults and causing ninety percent of the world’s earthquakes
and eighty percent of the world’s largest earthquakes, affecting cities all
around the Pacific. There are other areas of high earthquake activity, but none
as large or as active as the Ring of Fire.
Blank space, questions appear as the narrator
review. What are the spaces between tectonic plates called? What causes
earthquakes? What kind of scientist studies earthquakes? What is the point
above an earthquake called? What is the area called where most of the world’s
earthquakes and volcanic activity happen?