Transcript Lesson 13 Layers of Earth

Can animals sense earthquakes
‘before’ they happen?
Richter Scale
Which is the largest?
Fredericton, NB. 2009 Magnitude
3.6
Vancouver Island, 2008. Magnitude
5.1
Sumatra (Indonesia), 2004.
Magnitude 9.0
Ontario, 2006. Magnitude 4.1
Seismograms, epicenters,
earthquakes!
• Finish seismogram worksheet…in the next 10
minutes
– You need a pencil
– If you are finished:
*Raise hand, I’ll come over to check your work
*Turn on your net book
*http://maccallum.wikispace.com
- Lesson 13 in the menu
OR sign in to YOUR wikispace and work on your
WORD WALL.
Seismogram, seismologist, seismograph, epicenter,
focus, and fault should all be defined in your word
wall 
• Trailer
Look at your apple piece…
• Label the ‘parts’ of the apple with these
terms:
• Try your best
• You don’t have to write
on your apple, visualize
How did you arrange your apple
piece?
• Crust?
• Mantle?
• Outer core?
•
Inner core?
The apple piece represents the
inner layers of Earth
1st Layer : CRUST
Description: Thin,
Outermost layer
Thickness (KM): 5 – 35 KM
Very thin, compared to an
apple, the crust is the
apple’s skin.
2nd Layer: Mantle
Description: about 84% of earth’s volume is
mantle rock, the upper part is rock the
lower part is soft like taffy. This moves
earth plates.
Thickness: 3 560KM
Temperature: 4000oC
3rd Layer: Outer Core
Description: Liquid
layer, its motion creates
earth’s magnetic field.
Made from iron/nickel
metals.
Thickness: 2 270 KM
Temperature: 5500oC
4th Layer: Inner Core
Description: Solid
iron/nickel, intense
pressure
Thickness: 1 216km
Temperature: 6000oC
Knowing what you do about the
layers of the earth…
• In your large group:
A) Arrange yourselves to demonstrate layers of
the earth (only the radius: core  crust)
B) Every student should be included
C) The layers should represent ‘real life’, as in,
they should be to scale
Ex: 1 student = crust
Total mantle = 84% of volume
1 student = mantle
6 students = outer core
Total Core = 15% of volume
1 student = inner core
These numbers of students representing
each layer is not ‘to scale’. See if you
can do better!
How do we know all of this about the inside of
the Earth if we’ve never been there?
• Click to find the answer
• Another website to demonstrate seismic
wave movement
Why is the spinning Earth’s core so important to us?
• Click here to explore this question
Bonus Question: How do the s-waves produced
from explosives tell us what’s inside the volcano?
Listen to earthquakes!
• http://earthquake.usgs.gov/learn/listen/alls
ounds.php