LABS

     

AN INTRODUCTION TO EARTHQUAKES  

Objective:
To understand the basics of earthquakes and the science surrounding them.

Directions:

First Print this page.

Next connect to the internet and with the following link: Earth Quake Lab

Then follow the sequenced questions below.  You must answer every question (by following the directions)  in order to receive the extra credit.  If you miss a question you have to go back and locate the answers in the next.  After you hand in this assignment, I will give you a brief quiz on what you learned.

HINT:  I would go through the Earthquake Site one time without the questions, try to learn what you can, and then go through the Website with the questions.

Sequenced Questions:

Click on the Next button.

1) What have we learned about earthquakes.   List three examples.

     1.)

     2.)

     3.)


Click Next


2) What is an earthquake?


3) What do earthquakes generate?


4) What instrument do scientists use to study earthquakes


5) What is a seismogram?


6) When (and by whom) was the first seismograph created?


7) By the end of the __________ century, several European inventors had constructed different seismographs. Most were _____________ and operated by suspending a magnetic pendulum  within an electric coil.


8) Because a magnet moving, the movement of the ground during an earthquake can be converted into an _______________


9)  When was the WWSSN formed?

10) This network consists of over _____  seismographs in _____ countries.


11) Where were these seismograph puts?


12) The Earth's outermost surface is broken into ___________  which are 60-200 km thick and float on top of a more fluid zone, much in the way that icebergs_________ of the ocean.



Zim Fact:  These plates do one of three things.  They converge, diverge, or transform. Its these three type of movements which dictate how the continents form, look, and change over millions of years.



13)  Describe converging.


14)  Describe diverging.


15) Describe transformational


16)  Is the movement along plates smooth?


17) What causes the earthquake?


18) What is a fault?


19) At what rate is Pacific Plate moving?


20) What famous fault separates the Pacific Plate from the North American Plate


21) What force to the large blocks have which restrict the large blocks from moving apart?


22) What does the earthquake create?   What type of waves are these similar to?


23) In 1889,  E. von Rebleur Paschwitz  first noted that  seismic waves recorded in  Germany were generated by an earthquake that was in what international city?


24) What two types of waves do earthquakes generate?


25) Which type of wave travels fastest?  Which type of wave if first recorded by the seismograph?


26) How many seismograph stations does it take to pinpoint the exact location of an earthquake?


27) What are the two popular "scales" to measure an earthquake's intensity?


28) What is the ranges of numbers of the Mercalli Scale?


29)  Who developed the  Richter scale?


30) How many times greater is an earthquake of 6, than an earthquake of 5?  (Figure it out)


31)  What else does Seismology provide a measure (or monitor) of?


32)  What is seismic tomography?


33)  What are the three main levels of the earth?


34)  What is crust?


35) Where is the crust the thickest


36) What is the mantle?


37) What is the core?


38) What causes the Earth's magnetic field?


39) In which layer do most earthquakes form?


40) When did the great San Francisco earthquake happen?


41) What was the damage of the San Francisco quake?


42) What was the name of the act that mandated construction standards for California Schools?


43) How much higher did the Santa Cruz mountains become because of the Loma Prieta earthquake.


44) What do scientists now think was the cause of the formation of the Santa Cruz mountains?


45) If you live in California near a quake zone, for how many hours do the experts recommend that you keeps supplies on hand for?