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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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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 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! 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? 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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April 2010
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