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Archive for the ‘Geology’ Category

In class, we’ve talked a little bit about the devastating earthquake in China. Looking at the map, there isn’t any obvious plate boundary near the epicenter. What caused the earthquake?

Here’s the summary from the USGS:

“The Sichuan earthquake of May 12, 2008, occurred as the result of motion on a northeast striking reverse fault or thrust fault on the northwestern margin of the Sichuan Basin. The earthquake’s epicenter and focal-mechanism are consistent with it having occurred as the result of movement on the Longmenshan fault or a tectonically related fault. The earthquake reflects tectonic stresses resulting from the convergence of crustal material slowly moving from the high Tibetan Plateau, to the west, against strong crust underlying the Sichuan Basin and southeastern China.

On a continental scale, the seismicity of central and eastern Asia is a result of northward convergence of the India plate against the Eurasia plate with a velocity of about 50 mm/y. The convergence of the two plates is broadly accommodated by the uplift of the Asian highlands and by the motion of crustal material to the east away from the uplifted Tibetan Plateau.”

So there is folks….a reverse fault resulting from the compression of rocks due to the movement of the India plate against the Eurasia plate!

*Why was this such a strong earthquake?*

(Leave an answer for me.)  Use your knowledge from the Geology unit and check out the USGS site.

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Geology test

I just realized I forgot to post the dates for the Geology test!  Sorry…however, this should not be a surprise since we’ve been talking about it for weeks now!  And going on the study guide in class should be a hint.

Here’s the deal for the Geology test.  It is an OPEN-NOTE test….meaning you can write whatever information you deem necessary on a 5″ x 8″ index card.  You may use both sides.  Now, DON’T FORGET TO STUDY!  Since you will have the card, I will ask more questions that will require you to APPLY your knowledge.  I don’t want to test your skills of “finding the answer” on the your note card.

TEST DATES:

Block I: next Monday, May 5

Block II: next Tuesday, May 6

Block III: next Monday, May 5

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Geology Study guide

Yes, the evil teacher has scheduled a Geology test for the week AFTER the Science fair.  To be slightly kinder, I’m making it an open-note test.  Each student has received a 5″ by 8″ index card which they can write notes on and bring to the test.  I did warn everybody that they should not fore go studying because of the open-note format.

Next week there will be Block time on Monday and Tuesday set aside to work on the study guide.

Geology Study Guide

Due date:

Block I: next Wednesday

Block II: next Friday

Block III: next Thursday

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Earthquake Towers

Here are pictures from our Earthquake Tower building! Thanks to Irene Yun for the lesson plan.

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1)  Read “Earthquake Measurement”

2) CompleteHW#25:Seismic Waves

Due date:

Block I: Wednesday

Block III: Thursday

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3)  Read “Volcanoes”

4)Complete  HW#26:Ready, Set, Erupt!

Due date:

Block I: next Monday

Block II: Friday

Block III: next Monday

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Kilauea vent

Kilauea volcano erupted for the second time in the month on April 10th.  There are two major vents: Halemaumau and Pu’u O’o.  Both current eruptions occured at the Halemaumau vent.  Scientists have observed glowing rocks being ejected from the vent during the explosion.  Some blocks were blasted to the rim of the crater which is 230 feet from the crater.  The pictures above show the crater on April 6th and April 10th.

For updated information, check the USGS Hawaii Volcano Observatory page.

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1) Read “What are Earthquakes?”

2) Complete HW#24: Shake shake

Due date:

Block I: next Monday  (8th graders, by April 14th)

Block II: Friday8th graders: due by April 15th

Block III: next Monday  (8th graders, by April 14th)

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START YOUR SCIENCE PROJECTS!!!

Here’s the information for the rough drafts:

Science Fair Rough Draft requirements

Invention Rough Draft requirements

Due date:

6th/7th grade

*Block I: April 14

*Block II: April 15

*Block III: April 14

8th grade (Do not be late! The science fair is on April 30th!)

*Block I: April 21

*Block II: April 22

*Block III: April 21

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