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Today's Class

9/29/2009

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Aim- We will continue to discover how the circumference of the Earth could be meausured by the ancient people.

Std- 1 analysis, inquiry and design

We began work on Earth Sci Lab #5-  Eratosthenes and the Earth's Circumference.
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Today's Class

9/25/2009

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Aim -We will discuss the size and shape of the Earth by focusing on ways to determine the shape and then a procedure for finding the circumference of the Earth

 Std 1 Analysis, Inquiry & design

 Circumference at the equator is about 40,000 km
    At the poles-  closer to 40,000km

 Earth is Oblete Sphere

Circumference was first measured back in Ancient Egypt
 by measureing degrees and using proportion


801 HW-    Lab  & Poster Project proving how we know that the Earth is round due on Tuesday.  Bring in Compass and protractor
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Today's Class

9/24/2009

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Aim: We will begin to focus on Earth as a system by reviewing the layers of the Earth and beginning to understand the structural zones and how and why the Earth is a magnetic field.

Std 4- Sci Concepts

Click here for the powerpoint
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Today's Lab

9/23/2009

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Click here to download today's Sunspot Lab Sheet
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Today's Class

9/22/2009

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Review of density   -  Here is the worksheet on % deviation and click here for the density worksheet.
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Today's Class

9/18/2009

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Aim:  We will discuss the Protoplanet hypothesis and the origin of the atmosphere and then focus on percent- deviation.

Standard 4- Science Concepts


Proto- planet hypothesis adds onto the Nebular hypothesis.  It states that smaller clouds of dust rotated within the Nebula and

A gravitational force pulled it tighter together forming the beginnings of planets called Protoplanets.  Smaller collisions formed smaller objects which became moons and asteroids.  As a result of this group of collisions, hydrogen pushed together and a new sun was born.  

As the earth formed, there were 3 sources of extreme heat… compression (friction), radio-active minerals and meteorites that bombarded the new planet.    When the earth became so hot that It could not handle anymore, molten iron sank to the middle of The planet and vapor escaped, this was the release of water and Gas that developed into the ocean.
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Today's Class

9/17/2009

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Aim: We will continue to understand the basics of Earth Science
by reviewing the chapter and preparing for Monday's Quiz

Std 4- Science concepts

When we light a candle, we are affecting the wick.  We have
actually changed the wick to now be on fire.  This is the
independent variable.  What we change....  As a result of
this change other things happen, the wax melts, the candle
gives off light, the candle gets softer, it gives off heat...
These are all dependent variables.  They are dependent upon
the independent variable otherwise they do not happen!

PRECISE--- This means exact measure--- We are interested in accuracy!

We are physically able to see a model- it helps us to picture
and understand and predict.

Once we have results of an experiment, we publish them so
that other scientists can see them, learn from them, use
them and perhaps test them further.

Results are published in journals and magazines.  They are
presented in meetings and conventions.  

Other scientists then review them.  This is called Peer Review

Interdisciplinary Science means incorporating all different
types of science.

The control in an experiment is something that the experiment
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Today's Class

9/15/2009

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Aim-  We will review the scientific method by reviewing
the stps and then putting the method to use and discussing
percent of error.

Standard 4-  Science Concepts

Review-  Scientific method is a way of solving problems
 identify the problem
 gather information
 form a hypothesis
 test the hypothesis
 observe the test 
 gather data
 draw a conclusion

observations are made by using
  eyes, hands, smell, ears, taste (our senses)

hypothesis- an educated guess based on our observations and
  prior knowledge

Test our hypothesis- (experiment)-  things might change
 during the experiment.

  constants-  these are things that stay same
  variables- things that change
   independent variable- changed by
    the person doing the experiment
   Dependent variable- changes because
    of the change in the independent
    variable...

 I light a candle---- The change in the wick of the
  candle is now black and on fire (I made
  that happen) that change is the independent
  variable....  As a result of that change,
  the candle wax is dripping.  It is giving
  off heat and light, it is soft. These are all
  dependent variables.

THE DEPENDENT VARIABLE DEPENDS ON THE INDEPENDENT VARIABLE
    OR IT CAN NOT HAPPEN!!!!!!!!!

What we are trying to test is the independent variable

After an experiment....
 Analyze the experiment to make sure that it was
  accurate.... we do this by conducting
  many trials

 Accuracy is very important if we are going to prove
  something.  We need to use precision (exacts)
  We can not round numbers or guess

Scientific ideas are then taken and a theory is formed

 A lot of people have to look at your ideas and
  try them...... PEER REVIEW (they test
     the accuracy)

If a theory proves to be always correct.... we call it a law!


 
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Today's Class

9/14/2009

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Aim: We will review the metric system and discuss
it's importance by focusing on
length, mass and volume

Standard 6 Common Themes


.613=  613 thousandths  

Measure height in Centimeters..... Convert to
     meters
 how did the number change?

HW-What is the exact metric measurement of
            our 10 inches?
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Todays Class.

9/10/2009

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 Aim:  We will begin to understand the way the earth and other planets formed, by discussing nebular and other theories


Standard 4-   Science Concepts

What we learned last year-----
Big bang theory- the universe started with a huge explosion.  Lots of dust-  A star exploded.

Nebular Hypothesis-  We might conclude that the Nebular Hypothesis is a part of the big bang theory-  It states that the earth and other planets were formed by a fast moving cloud of rotating dust.  We call the cloud a SOLAR NEBULA.

Nebula- Helium & Hydrogen -about 5 billion years ago began to contract and it had the shape of a flat disk with a (proto)sun in the center

Planets close to the proto sun were formed from metallic and rocky clumps of the dust..... those farther away were formed from fragments (small pieces of dust) and even ices.

Todays orbit resembles what is left over from the rotating cloud in the Nebula

















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  • Home
  • Earth Sci Labs
  • 7th Grade ON-LINE TEXTBOOK
  • 7th Grade
    • 7th grade Lab Reports
    • Current events
    • 7th 1- Scientific Theory
    • 7th Lanforms & Maps >
      • Mountain Project
      • Mineral/ Gem Project
    • 7th 3- Geology >
      • Weathering & Erosion
      • Fossil Project
      • Plate Tectonics
      • Earthquakes
      • Unit Test Review
    • 7th Unit 4 Atoms >
      • 7th Atom Brochure
  • Earth Science by topic
  • Submit Homework
  • 8th Grade Units 1-4
    • Unit 1 Models of the Earth >
      • Metric Review
      • Chapter1 Review
      • Chapter 2
      • Topographic Maps
    • Unit 2 Rocks & Minerals >
      • Minerals
      • Rocks
    • Unit 3 Dynamic Crust >
      • Earthquakes
      • Earthquakes & Interior
      • Hot Spots
      • Volcano
      • Dynamic Crust Review >
        • Practice Tests
    • Unit 4 Shaping the Earth's Surface >
      • Weathering
      • chemical weathering
      • Another Weathering video
      • Erosion Videos
      • Glaciers >
        • Glacier Pwr points
      • Changing Earth
      • Unit Review
  • 8th Grade Units 5-9
    • Unit 5 Earth History >
      • Archean History
      • Geological Eras
      • Geologic Sequence Project
      • Unit 5 Review
    • Unit 6 & 7 Climate & Meteorology >
      • 801 Vacation Work
      • Weather Tracking HW Lab
      • Meteorology info
      • Station Models
      • Wind
      • Storms
      • Weather & Climate Review Tests
    • Unit 8 Earth & Space
  • 801 Test Review
  • Ways to pass the regents
  • files
  • Other Important Links
  • New Page