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.
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
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
Review of density - Here is the worksheet on % deviation and click here for the density worksheet.
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.
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
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
form a hypothesis
test the hypothesis
observe the test
draw a conclusion
observations are made by using
eyes, hands, smell, ears, taste (our senses)
hypothesis- an educated guess based on our observations and
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
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
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
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
If a theory proves to be always correct.... we call it a law!
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
how did the number change?
HW-What is the exact metric measurement of
our 10 inches?
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
Earth Science Help