Earthquakes Flashcards
(33 cards)
How many earthquakes happen in each year that scientists have estimated
Several million
Around about how many people died in the Haiti earthquake
About 230000
Activity one
Page 36
Where do you earthquakes happen
Along the margins of tectonic plates
Plate boundaries
What causes earthquakes
The tectonic plates slowly grind against each other
They vibrate through the earths crust the shockwaves cause the ground shake
Page 37
Picture act2
Where is the earths crust weakest place
Where the tectonic plates meet
Where do you earthquakes happen
On the plate boundaries in the same areas as volcanoes
Why are some communities in higher risks than others
People living closer to the plate margins on high-risk than others because that’s where earthquakes occur
How much can and earthquake affect the people in this area depends on a number of things such as
The quality of buildings theyLive in how well this area is prepared for an earthquake how many people live in the area the availability of people who can rescue and treat earthquake survivors
Name some high risk comunities of an earthquake
Cities of more chance of being hurt then the real areas because of the buildings. Sunami is can be caused. Places with Poor rescue plans can wait days to be rescued
At four page 39
List reasons why some people at More risk than others
What is the earths crust made up of
Take tectonic plates
What is the area called where tectonic plates meet
Plate boundry and fault line
What is it called when the area in the earths crust where the shockwaves begin
The focus of the earthquake
Which causes more damage shallow earthquakes or deep earthquakes
Deep earthquakes whyThe further the shock waves can travel causing damage over a wider area
What is the place on the surface of the Earth directly above the focus
Epicentre
Where is an earthquake most extreme
At the epicentre
What are the scientist called who study the seismic waves released from the centre of an earthquake
Seismologists
What instrument do seismologists use to record the pattern of the wave
Seismolgraphs
What can seismologists work out
How strong the earthquake is how long it will be
Who was the Richter scale named after
Charles Rector
Who was Charles Rector
And American Seismologist
What is the Richter scale used for
How strong the earthquake is
