## Sunday, October 16, 2011

### The Wonderful Week of October 17th

Are you ready for another awesome week at Ellis!?  I hope so, becuase we have a lot planned!

In math, we will be taking a look at the connection between fractions, decimals, and percents.  We will use the art of the famous American artist Ellsworth Kelly as inspriation to create our own pieces of art using fractions, decimals, and percent concepts.   Be on the lookout for some math homework being sent home this week.  Remember, the work you do at home is just as important as the classwork you do.

In science, we will finish up our studies on plate tectonics.  Mr. Brandon will be here to talk to you about layers of the inner Earth.  Keep in mind your "Clean Your Plate" choice sheet is due this Friday.  One Friday, you will also have a test on plate tectonics.  Here is your study guide:

1.  The Theory of Continental Drift
a.  Created by Alfred Wegener in the early 1900’s
b.  States that all continents were once connected into one
supercontinent called Pangaea.
c.  Pangaea later broke into two separate continents called
Laurasia and Gondwana.
d.  Proof of Continental Drift
- Continents seem to fit together like a puzzle
- Similar fossils have been found on matching coastlines
- The mid-ocean ridge is where the plates are pushing apart
form each other causing the continents to move.  The movement of the magnetic pole throughout the earth’s history has caused alternating stripes of magnetic minerals in the rocks found beneath the ocean.
2.  Layers of the Earth
a.  Inner core- solid
b.  Outer core- liquid
c.  Mantle – slowly moving, molten rock
- Asthenosphere- area of convection directly below the crust
d.  Crust (Lithosphere) – surface of the earth.  Broken into many
pieces
3.  Boundaries
a. Divergent boundaries- plates moving away from each other
- mostly found beneath the ocean (mid ocean ridge)
b. Convergent boundaries- plate moving towards each other
-continent/continent create high mountains
-ocean/ocean create ridges
-ocean/ocean create mountain chains with volcanoes
c.  Transform boundaries- plates slide past each other horizontally
-cause earthquakes
4.  Earthquakes
a.  Mostly happen at where crust is broken (faults)
b.  The focus is the place inside the earth where the earthquake
originates
c.  The epicenter is the place on the earth’s surface directly above
the focus
d.  The severity of an earthquake is measured using the Richter
scale.  0 (mild) – 9 (severe)
5.  Volcanoes
a.  Mostly found at ocean/continent convergent boundaries
-“Ring of Fire” – area where most volcanoes are found

Vocabulary Words

lithosphere- the solid, outer layer of the Earth that consists of the crust and the rigid upper part of the mantle.
asthenosphere- the soft layer of the mantle on which the tectonic plates move.
mesosphere- the strong, lower part of the mantle between the asthenosphere and the outer core.
continental drift- the hypothesis that states that the continents once formed a single landmass, broke up, and drifted to their present locations.
convergent boundary- the boundary formed by the collision of two lithospheric plates.
divergent boundary- the boundary between two tectonic plates that are moving away from each other
transform boundary- the boundary between tectonic plates that are sliding past each other horizontally
fault- a break in a body of rock along which one block slides relative to another
uplift- the rising of regions of the Earth’s crust to higher elevations
subsidence- the sinking of regions of the Earth’s crust to lower elevations

Finally, this Friday is Fall picture day!  Be sure to wear your best smile :)

See you Monday AM,

Mr. Trent