The science ideas that i learned this week:

• I learned how to make different types of motion diagrams
• I also learned what they were used for and how they were created.
• To make a motion diagram you would first draw dots, just like on the dot diagram ( we stopped using that because they weren't that accurate and like Mr. Segen said,"they sucked"
• After drawing the dots you would draw arrows connecting them. The length of the arrows tells us the speed of the object, and the way that the arrow is facing tells us the direction. 
• You also label the positive and negative direction, and the origin.
• Then you write V1 V2 V3 V4.. over each point to show how many velocities there are.
• Motion diagrams can go up, down, left, and right.  Doing this will help the person that is looking at it really understand what the motion diagram is saying.  It will also be a lot more accurate.
• Another idea that we learned is the delta v. It is represented by a triangle and a v or just a big arrow.  it is the way to find change in velocity.  
• When an object is speeding up: delta v and v are going in the same direction
• When the object is slowing down: delta v and v are going in opposite directions.

• For homework on Wednesday I had to create a story and create a motion diagram.  My story was: The car was going at a steady pace, then it slows down to go through a yellow light, and then continues at a steady speed.  (I still don't know how to put pictures on here, but soon i will learn!!!) My motion diagram started off having the dots the same distance away from each other. This means that the arrows were the same length.  Then the dots got closer and closer together, and the arrows got shorter in length.  Then the dots sped up and went back at a steady pace, the arrows got longer and longer and then stayed the same length (just like at the beginning.)

What real world application is there?????

• In our every day lives we are speeding up and slowing down and now we found the proper way to record that.  When we drive, run, and walk we are speeding up and slowing down even if we don't notice it.

~kathy gagliano~       :):):):):):):):):):):)

WEEK OF NOVEMBER 2nd

On Monday:

 we took a partner quiz.  My partner was Laura!!! I didn't take any notes that day so I'm not really sure what else we did that day. sorry:(.  

On Tuesday:

 we talked about trend lines.  

A trend line: is created by drawing a straight line through points on a graph.  The line will not connect every point, but it will connect the ones that are in a straight line. 

- I wish I could upload a graph, but i don't know how too... i will find out and put it on next time.  I will ask Mr. Seagan or Mr. Finley...

On Wednesday:

We went over our homework.  I was very confused about it but then we did it in class and i finally understood it.  

-We also found out the definition of what a function is.  

Function: A rule, when you already have the independent variable and want to find the dependent variable.

-We also learned how to find a slope.  You find a slope by position divided by time= slope. 

All of these ideas are very important because we use graphs a lot.  We have to know how to interpret them.. we use them a lot in math but more importantly in science.  Since we didn't take a lot of notes this week, my blog is not as long.  I really liked having a three day week!!!!! okayyyy bye...

Science blog 10.26.09

-This week i learned what a physical quantity is.  Examples of physical quantity are: meters, kilometers,grams,inches,quarts,pounds,miles,feet,and cups.  

-We also learned how to make graphs, dot diagrams, and tables.  These show how fast an object is moving, and if it moving at a constant pace.  

-If an object starts moving very slow and then continues to speed up, the dot diagram would look like this: . . .  .   .    .     .      .       .        .         .

-If an object starts fast and slows down, the dot diagram would look like this: .      .     .     .    .   .  . . . ....

-If the object stays at a steady pace, the dot diagram would look like this: .   .   .   .   .   .   .   .   .   .

-We made the graphs by labeling the x axis TIME and the y axis POSITION. 

-On Friday we used a motion detector/graphing machine.  Mr. Seagan would draw a graph on the board and we would have to figure out how to move so that the graph on the machine and the graph on the board would look the same.  It was challenging at first but once my classmates helped me and told me how to move we got the graph on the machine to look exactly like the one on the board!!!!!!