HAZARDS😱 Flashcards
what scales are used to measure earthquakes?
Richter and mercalli scale
what does the mercalli scale describe?
intensity and likely effects of the earthquake
what does the richter scale measure?
magnitude or energy released
what are some hazards?
hurricanes, heatwaves, earthquakes, volcanic eruptions, climate change, tropical storms, blizzards.
what is the mantle?
semi-molten of the earths structure below the crust
what is a natural hazard?
a natural event which threatens people or has the potential to
what are convection currents?
heat driven currents in the mantle
what is magnitude?
the size of an event
what is frequency?
how often a hazard occurs
what is the focus?
point within the earth where energy is released due to a sudden slip
what its the epicentre?
point in the surface directly above the focus
what is a seismometer?
a machine used to measure the shaking of the ground
what is a constructive boundary?
where 2 plates move apart
what do constructive boundaries make?
mid-ocean ridges and non-explosive volcanoes
what is a destructive boundary?
where 2 plates meet
what does a destructive boundary make?
trenches, volcanoes, large earthquakes
what is conservative boundary?
2 plates slide past each other
what do conservative boundary make?
potential to create large earthquakes
what is the most inner part of the earth called?
inner core
what is the second most outer layer of the earth called?
outer core
what is the most outer layer of the earth called?
crust
what is between the crust and outer core?
mantle
name a destructive plate boundary.
between Philippines and pacific plate
name a constructive plate boundary.
between antarctic and into-australlian plate
name a conservative plate boundary.
antarctic and nazca plate
what are some natural hazards
tsunami, earthquake, tornado, volcanic eruptions
