Can animals sense earthquakes ‘before’ they happen?

Richter Scale

Which is the largest?

Fredericton, NB. 2009 Magnitude 3.6

Ontario, 2006. Magnitude 4.1

Vancouver Island, 2008. Magnitude 5.1

Sumatra (Indonesia), 2004. Magnitude 9.0

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 menuOR 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 includedC) The layers should represent ‘real life’, as in,

they should be to scaleEx: 1 student = crust 1 student = mantle 6 students = outer core 1 student = inner core

Total Core = 15% of volume

Total mantle = 84% of volume

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

Why is the spinning Earth’s core so important to us?

• Click here to explore this question

• Another website to demonstrate seismic wave movement

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/allsounds.php