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 inner core mantle Crust outer core

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: Arrange yourselves to demonstrate layers of the earth (only the radius: core  crust) Every student should be included The layers should represent ‘real life’, as in, they should be to scale Ex: 1 student = crust 1 student = mantle 6 students = outer core 1 student = inner core Total mantle = 84% of volume Total Core = 15% of volume These numbers of students representing each layer is not ‘to scale’. See if you can do better!

Click to find the answer 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/allsounds.php