Save
...
Challenges of natural hazards
Tectonic Hazards
Earthquakes & Volcanoes
Save
Share
Learn
Content
Leaderboard
Share
Learn
Created by
Charlotte
Visit profile
Cards (21)
Movement caused by
earthquakes
Plate movement
,
stress buildup
, and
fault movement
Where do volcanoes and earthquakes occur?
Where
plates
meet
View source
What happens at destructive plate margins?
Denser
oceanic plate
moves down into the
mantle
Melts and forms
magma
Magma rises through vents to form a
volcano
View source
How do volcanoes form at constructive plate margins?
Magma
rises into the gap created by moving apart plates
Forms a volcano
View source
What are hotspots in relation to volcanoes?
Areas in the
mantle
that are really hot
View source
What do volcanoes emit when they erupt?
Lava
and
gas
View source
What can ash emitted by volcanoes cause?
Cover land, block out the
sun
View source
What are pyroclastic flows?
Super heated
currents of gas, ash, and rock
View source
How do earthquakes occur at different plate margins?
Destructive
margins: pressure builds as one plate is forced down
Constructive
margins: tension builds as plates move apart
Conservative
margins: tension builds when plates grind past each other
View source
What happens when plates jerk past one another?
They send out
shock waves
View source
What is the focus of an earthquake?
The
point
where the
earthquake starts
View source
What is the epicenter of an earthquake?
The point on the surface above the
focus
View source
How are earthquakes measured?
Using the
moment magnitude scale
View source
What does the moment magnitude scale measure?
Measures the amount of
energy released
Indicates the magnitude of the earthquake
View source
What is significant about the logarithmic scale of the moment magnitude scale?
A magnitude
7
causes
ten times
more shaking than
6
View source
What damage do earthquakes of magnitude 6 and below typically cause?
Slight damage to
buildings
View source
What can earthquakes of magnitude 7 and above cause?
Major damage and
deaths
View source
What should you know about tectonic hazards?
Know
how
and
where
they
form
No
need
to
draw
maps
View source
What are the three types of plate margins?
Destructive
margins
Constructive
margins
Conservative
margins
View source
What is the role of pressure in earthquakes?
Pressure builds up at
plate margins
View source
How does the moment magnitude scale differ from the Richter scale?
Moment magnitude measures
energy
, Richter does not
View source