Week of December 5 thru Dec 21 Earthquakes and Seismic Waves

CHAPTER TWO TEST – EARTHQUAKES

Monday Dec. 19

Make Your Index Card

HOW A SEISMOGRAPH WORKS

Click on the picture below to see an animation of how a seismograph works.

What shakes, and what doesn’t?

How a Seismograph Works

Click on the picture below to see

HOW TO FIND THE EPICENTER of an EARTHQUAKE

Chapter 2 Seismograph Animation Picture

THIS WEEK’S LESSON

 Movement of body waves away from the focus of the earthquake. The epicenter is the location on the surface directly above the earthquake's focus.

Earthquakes are a form of wave energy that is transferred through the crust. Motion is transmitted from the point of sudden energy release, the focus, as seismic waves that travel in all directions outward. The point on the Earth’s surface directly above the focus is termed the epicenter.

 

                                                                            SEISMIC WAVES AND THE SLINKY

The Slinky P-Wave and the S-Wave

 

P-waves or primary waves are formed by the alternating compression and expansion of the crust. They are the first to arrive at a seismograph station, and travel in a straight line. Think of the slinky we did in class! P-waves also have the ability to travel through solid, liquid, and gaseous materials.

 

Model of the Primary Wave

S-waves or secondary waves are formed by the side-to-side movement of the crust. They are the second to arrive at a seismograph station, and travel more slowly. Think again of the side-to-side slinky we did in class, or look at the example below.

s wave

  • S-waves have the ability to travel through solids, but stop at liquid and gaseous materials.
  1. What does that mean as the waves travel through the earth’s layers?
  2. What happens at the Outer Core?
  3. What does this help geologists to know about the Outer Core?

 

 

Surface waves are something like the waves in a body of water — they move the surface of the earth up and down. This generally causes the worst damage because the wave motion rocks the foundations of manmade structures. Surface waves are the slowest moving of all waves, so the most intense shaking usually comes at the end of an earthquake.

Plotting Earthquakes Online Assignment

Online Assignment

Due Friday December 9

Plotting Earthquakes Logo

USGS Recent Earthquake Map

Directions:

1. Go to the USGS – Earthquake Center Website, this shows all the activity for the past 7 days. Find yesterday’s earthquake data. Click on the map above, or the link above, to open that web site.

2. Choose 3 different earthquake locations, with magnitudes of 3.0 or higher, and plot them on the map provided using a colored pencil.

3. Each date will be a different color, for example 11/24/16= red, 11/25/16= blue, etc…  On your map, create a key to indicate when those earthquakes occurred.

4. Continue until you have 5 days plotted on your map (25 data points total).

You will find the earthquakes for each day this week, record the earthquake data, and then plot the location of the earthquake on the map you received in class.  By the end of the week you will have all 5 charts completed. 

We will use the information from the chart, and what we had discussed in class, for a WORM activity on Monday, December 12.

If you cannot find your map, click on the map below for another copy.

If you cannot find your worksheet, click here for another copy.

You may also use an APP that you find for your Smart Phone or Tablet. Look for “Earthquakes” apps that provide real time data.

Plotting Earthquakes Map

Have Fun!

Alternate Assignment:

Click on the picture below to take you to

My Schoolhouse.

My Schoolhouse

Read the article and complete the answers on the screen.

Keep trying until you get 8/8 correct!

When you get them all correct, print out the page that looks like the picture below, or complete the worksheet from class.

Earthquakes Modified Completion

In class this week we will look at the movement of the Earth’s crust along a crack in the crust called a fault. The earth slips, slides or drops along these faults depending on the stress involved, and the direction of movement. We discussed three types of stress – tension, compression and shearing.

REMEMBER

PLOTTING EARTHQUAKES

WORM NEXT WEEK!

 

TYPES OF FAULTS

Click on the picture above to see the animations of the Fault Motions. Think and answer the following questions:

Along what type of plate boundary might you find COMPRESSION stress? _________________

Along what type of plate boundary might you find TENSION stress?

_________________
Along what type of plate boundary might you find SHEARING stress? _________________

Week of November 28 Introduction to Earthquakes

November 29 Cow Book Assignment

Earthquake Destruction

Watch the video above on Earthquake Destruction. There are several ideas and concepts that are presented for which you should be taking notes.

  • List two things you learned in the film.

The film talks about earthquakes being ‘a creative force’.

  • What does the narrator mean by this?
  • Explain this comment.

STRESSES AND FAULTS

We are also looking at the relationships between Plate Movement, Stress and Types of Faults we find on the earth. These faults cause the ground to move in different ways during an earthquake.  Click on the animation below to see how these stresses and faults are related.

stress-animation-diagram

Week of November 7 Theory of Plate Tectonics

PLATE TECTONICS AND PLATE BOUNDARIES

                             Excellent Video Summary for Chapter Exam

ASSIGNMENT:

Look at this video for a Quick Summary 

                  • Click HERE for the Worksheet with the Lyrics
                  • Watch the Video and Complete the Lyrics

“Pangaea’s Moving Farther Apart Again”

 

(Credit to Mr. Parr – creator of many YouTube Videos for students)


Convection Currents in the Earth

As we were studying Continental Drift, we learned that although Alfred Wegener had a great theory, he was not able to explain HOW the continents moved.  About 60 years later geologists started to look at the ocean floor, and they discovered that the ocean had a very long range of mountains which they called the Mid-Ocean Ridge.  Scientists also learned more about what was happening in the mantle, and found that the heat of the core was creating Convection Currents n the mantle.

The tectonic plates rest on the asthenosphere, a layer of soft rock.  Rock in the asthenosphere and in the rest of the mantle moves from convection.

Convection is energy transfer by movement of a material.  Heat causes material to become less dense – it then rises, cools, becomes denser and then sinks, only to repeat again.  In a pot of boiling water, the water gets heated at the bottom, rises to the top, cools when it hits the air, and then sinks again, forming a looped current.

Click on the picture to see the animation.Convection Currents

The core of the earth makes the heat.  It causes the molten material in the mantle to rise, cool and then sink back to the center, where it gets heated again. Notice how the convection currents in the earth are all around the mantle, heated by the core.

Convection in the Mantle

The lithosphere is broken into tectonic plates, and these float on the asthenosphere.  As the convection currents flow, the floating plates also move, very slowly, about an inch a year.  This is what caused the continents to move!  Look closely at the diagram, and then clink on the link below to see the movement.

Convection Current Animation

As you can see by the animation, the convection currents in the mantle make the plates in the lithosphere move.  Some of them move together to collide at a CONVERGENT BOUNDARY to form mountains, and some of them move apart at a DIVERGENT BOUNDARY to form cracks in the crust.  Magma comes up through these cracks, creating a Mid-Ocean Ridge on the sea floor.

Click on the link below to see how new ocean crust is being made at the Mid-ocean Ridge, and that the new crust is pushing the older crust away.  The farther you go from the ridge, the older the crust is.  This is one way that scientists can prove that the plates are actually moving!

Sea Floor Spreading Animation - Click to see the animated movement of the ocean floor.

Click on the picture above to see the animation.

In class we then took notes on the Smartboard to review the convection currents in the mantle, their effect on the plates of the lithosphere, and we had an introduction to DIVERGENT and CONVERGENT boundaries.  The plates move because of the convection currents in the asthenosphere (mantle) forcing the plates to flow with the current.

Convection Current Diagram

Divergent Boundary and the Mid Ocean Ridge

Khan Academy Video on Divergent Boundaries

Convergent Boundary - Ocean and Continental Crust

Khan Academy Video on Convergent Boundaries

As a result, the Earth is broken into many

TECTONIC PLATES.

Tectonic Plates.

Convergent Boundary Collisions - What happens?

Look at the types of convergent boundaries above….what happens at each of these collisions?

Can you name the features that are formed with the types of collision

ISLAND ARCS

COASTAL MOUNTAINS

DEEP-OCEAN TRENCHES

FOLDED MOUNTAINS

Click on the picture below to see the animation we used in class.

Tectonic Plate Animations

Week of October 31 Continental Drift

continentaldrift

 

We ended last week with a review of the layers of the earth, and used diagrams on the SmartBoard to identify the various layers and their key features.    Below are the screen captures of the SmartBoard activity for those of you that missed the class.  We also discussed the two type of crust, CONTINENTAL and OCEANIC, and the characteristics of each.  Continental crust is much thicker than the oceanic crust, and is made of GRANITE.   Ocean crust is thin, much denser, which is why it is lower on the earth’s surface, and is made of BASALT rock.

Smartboard Layers of Earth Diagram

Smartboard Kinds of Crust Diagram

 

This week we begin a discussion of the evidence that geologist Alfred Wegener developed to support the Theory of Continental Driftthat all the continents were at one time connected into one large land mass called Pangaea.  We made cut-out maps of Pangaea and then identified where Wegener discovered similar fossils, land formations, (such as mountains) and evidence of climate changes in glacial scratches and areas of coal.  We drew them on the SmartBoard diagrams and colored the areas where he found his evidence.  Unfortunately, Wegener was not able to convince the scientists of his day that the continents had actually moved!  See the diagram below for the three main pieces of evidence that Wegener used to develop his theory.

Smartboard Pangaea Diagram

Why did not scientists believe that the continents had moved?

What was missing from Alfred Wegener’s Theory of Continental Drift?

What was the missing piece?

 

 An animation of the breakup of Pangaea to form the world we know today!

Enjoy this Music video from Mr. Parr,

a Science teacher who loves music!

CRUST in PIECES

To see a video of the changing earth continents and shapes, click here

tectonoc Plate animation Cambridge

Week of October 17 Layers of the Earth

earth-layers-27140980This week we begin our study of the

Layers of the Earth.

Earth has several layers.  Many geologists believe that as the Earth cooled the heavier, denser materials sank to the center and the lighter materials rose to the top. Because of this, the crust is made of the lightest materials (rock- basalts and granites) and the core consists of heavy metals (nickel and iron).

The Inner Core is a solid sphere of metal, mainly nickel and iron, at Earth’s center. The Outer Core is a layer of molten metal, also mainly nickel and iron that surrounds Earth’s inner core. The Mantle is the layer of rock between Earth’s outer core and crust, in which most rock is hot enough to flow in convection currents.  It is also Earth’s thickest layer.  The Crust is a thin outer layer of rock above a planet’s mantle, including all dry land and ocean basins. Earth’s continental crust is 40 kilometers thick on average and oceanic crust is 7 kilometers thick on average.

The Lithosphere is the layer of Earth made up of the crust and the rigid rock of the upper mantle, averaging about 40 kilometers thick and broken into tectonic plates. It is cracked, and makes up the Tectonic Plates of the earth’s surface.  Tectonic Plates are  large, moving pieces into which Earth’s lithosphere is broken and which commonly carries both oceanic and continental crust.  Look at the diagram below to see the various layers.

Layers of the Earth

The Asthenosphere is the layer in Earth’s upper mantle and directly under the lithosphere in which rock is soft and weak because it is close to melting.  The lithosphere ‘floats’ on the asthenosphere.

Notes we took in class on the SmartBoard!

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Click on the picture below to take you to an interactive animation describing

 

Earth’s Structure!

Click on the pics below to look at the animations we used in class.

See the Layers of the Earth in Detail

 See How Geologists Study the Inside of the Earth.

Week of Sept 26 – Mapping the Earth

Having Fun with the

Topographic Rock Activity

Topographic Map Activity
Topographic Map Activity

Contour (or Topographic) Maps

Finding the Gradient

 Introduction to Topographic Maps

In class this week we are reviewing maps, and beginning our study of Topographic Maps.  Below is a video that demonstrates the activity planned for this week.  If you missed the activity, you can view below and see what we did!

 

 

Mountains are a great way to use and show the use of elevation maps.  Back at Nature’s Classroom they hiked the hills behind the camp.

In class this week we will start to study Maps and their uses. 

 TOPOGRAPHY shows us the shapes and features of the earth’s surface, and TOPOGRAPHIC MAPS use CONTOUR LINES to represent the changes in elevation.  In class you are learning the vocabulary of contour lines, index contours, and contour intervals.

Below is a topographic map of the hiking trails and the elevations around a past Nature’s Classroom location.

Silver Bay Topographic Map

 

Click on the map to make it bigger.

Look at the contour lines and then answer the following questions:

1.  What is the elevation of Jabez Pond?

2.  What is the distance between the Index Contours? Remember, these are the darker lines.

3.  How many contour lines are there between the darker Index Contours?

4. Therefore, what is the Contour Interval?

5. Challenge Question: What is the approximate elevation of the top of No 108 Mountain?

 

Week of September 19 CSI, The Scientific Method and The Gum Lab

GUM LAB DUE MONDAY SEPTEMBER 26

 Questions for the Week

What is DATA?

What are OBSERVATIONS?

What is meant by the word EVIDENCE?

How do you write a CONCLUSION?

This week we begin our studies with a review of the Scientific Method, an organized approach to defining, thinking about and developing a process to explore a problem statement and to conduct a lab investigation.  These steps were taught in the earlier grades, and we began our year with a review of the processes…and did an activity called CSI Bourne to understand the difference between Evidence (Data) and a Claim (Conclusion). 

You can also look at a clip of MYTHBUSTERS – HOT or COLD BASEBALL to see how the students used the Scientific Method to conduct their experiment on how temperature may affect a baseball. 

Click HERE to see the video!

This will lead to the Gum Chewing Lab where students will design their own science investigation to answer the question:

What Happens to the Mass of Gum

as you chew it over time?

GUM LAB REPORTS WILL BE DUE

MONDAY SEPTEMBER 26

See link for the LAB REPORT RUBRIC under Class Notes

Welcome to Grade 8 Science

Welcome Back to BMS and

Welcome to 8-2 Science!

 Glad you found this website
….we’ll be using this a lot as the school year gets underway!
There are many tools and links on the classroom website that will allow you to always stay in touch with what we are doing, where classroom handouts and notes will be, and dates of important events like projects and tests.  In fact, this school year you will also be creating your own websites for your own work!
Class Policies
Even though no one is perfect, we must all try to do our very best in whatever we do. To be your best in Mr. Ruggiero’s class, the two most important things to do are stay focused on your class work and to keep a cooperative attitude with your classmates and teachers at all times.
Click on the link below to take you to the Classroom Overview for the school year. Understanding how our classroom works will help you to always stay focused and keep a cooperative attitude.

Class Materials

  • Covered Textbook
  • Composition Book (Cow Book)
  • Pens or Pencils
  • 3-Hole Punch Folder or Binder for Handouts/Papers
  • Pencil Sharpener

 

Click to see printable version of

Overview of Grade 8 Science