Completing the Lab and Correcting Homework

In science class on Tuesday, the first thing we did was correct our homework (the speed problems sheet #2). The answers to it were:

1. Formula: s=d/tPlug: s=367km/8h
   Chug: s=45.88 km/h
2. Formula: s=d/t
   Plug: s=113.45m/4.7h
   Chug: s=24.14 m/h
3. Formula: d=s*t
   Plug: d=31 m/s*25 s
   Chug: d=775 m
4. Formula: d=s*t
   Plug: d=303 km/h*5.5 h
   Chug: d=1666.5 km
5. Formula: t=d/s
   Plug: t=5832 km/913 kmph
   Chug: t=6.39 h
   *** We had to convert: 5,832,000 m = 5,832 km
6. Formula: d=s*t
   Plug: d=15,120s*6.8 m/s
   Chug: d=102,816 m (1028.16 km)
   ***We had to convert: 4.2h=15,120 s

We completed the Bean Bag lab by answering the following questions:

1. Write an answer to the purpose question: "How does the distance an object is dropped affect the time it takes the object to fall?"
2. Make a list of the data from this experiment that supports your answer to #1. In other words, make a list of the data that will convince Ms. D you are right.
3. Make a list of scientific facts/theories/explanations that support or explain your answer to #1. (Hint - your textbook or Google doc may help!)
4. Describe what is happening on your graph. Be sure to use scientific vocabulary and numbers to support what you are writing! (5 sentences min.)
5. What are four specific errors you might have made in this lab?

We made line graphs, and we also talked about positive and negative correlation, and about how distance affects time in our lab.

• Positive correlation is when the x axis of a graph increases, and the y axis also increases.
• Negative correlation is when the x axis increases but the y axis decreases.
• No correlation is when there is no pattern at all. (scatter plot)

We figured out that our line graph should have a positive correlation. We started talking a little bit about acceleration, which is our next step in motion and our only homework for the break is to read pages 22-27 in our textbook.

The next scribe is...

JAMES!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

HAPPY

THANKSGIVING!!!!!!!

(Video made by me)

Thursday , 19.11.09 and Friday, 20.11.09

Ms.D also went over some math with us explaining possible and impossible things that could happen and that couldn't happen. The things that were explained are in the pictures below.

On Thursday in class we went over out homework. Our homework was a sheet of speed problems. Here's an example of what a speed problem looks like :

• Question:An Opel car travels 736 km in 8 hours. What is the speed of the car during that time?
• Answer: formula-distance/time=speed(rate) plug- s=736km/8h chug-s=92kmph

Ms.D also went over some math with us explaining possible and impossible things that could happen and that couldn't happen. The things that were explained are in the pictures above.

In class we started our new lab!

On Friday in class we finished up our bean bag lab and for homework we got another speed practice sheet

THE NEXT SCRIBE WILL BE......

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VIKTOR!! =]

http://www.youtube.com/watch?v=DYW50F42ss8&feature=related

Really Cool Song!

Science Class on the 17th of Nov. 2009

Today in class we did more laptop work. The laptop work included:

• Class notes on google docs. Ms. D. says you may replace this for handwritten notes if you want to. You don't have to if you don't want to. The class notes look like this:
• Another subject we covered in class was the definition words that have to do with motion. Hear they are copied off google docs:
• Motion: the state in which an object's distance from its reference point is changing. Motion is determined by a reference point.
• Reference Point: An object or place that is used to compare if something is moving or not. The Reference Point should not be moving.
• Instantaneous speed: The speed an object is moving when given a certain amount of time.
• Velocity: The speed of an object in a certain direction. ex. 158km/13hrs. North
• Speed: How fast something travels per unit of time. To find out the speed you must divide distance by the time given. (s=d/t) kmph, m
• Average Speed: Two points on graph. Total distance divided by time is how you find the average speed. The points are start to end point. (not always accurate)
• We also covered math problems using formula, plug, and chug. Unit of distance/secs, km, or meters
• The homework for todays class was to look at the bog which you are doing if you see this. The other assignment are to do the speed math sheet problems.
• The next scribe is Laura.

Technology in Science...

It didn't matter that it was Friday the 13th in Science since we got to try out the new

STUDENT LAPTOPS!

Below is a very fuzzy jing picture about them. Sorry about that-Blogger won't let me make it any bigger.





Before playing with the laptops we were put into groups:
Group T-Viktor, Erik, Antonia and Fabi
Group S-Reza, Cip, Emilie and Noam
Group D-Bryce, Vance, Iva and Gio
Group R-Laura, Alix, James and Kat

Then we each went onto our Gmail accounts and accepted the invitation from Ms.D to be part of a Google Doc.
Each group had to write a definition for the following terms: Motion, Reference Point, Speed, Average Speed, Instantaneous Speed, Velocity, and Slope.
For homework, we each had to write other notes from the chapter.
Here's the link to the document: http://docs.google.com/Doc?docid=0AaRpn_hKWFmNZGhrZnFxZ3JfMWZmZ2Rrc3Rj&hl=en&pli=1

Answers to Wednesday's homework:

IV: 1. Time=5 seconds
2. Distance=5 meters
DV: 1. Distance in 5 seconds at normal, fast and slow pace
2. Time to walk 5 meters at normal, fast and slow pace
CV: testers, meter sticks, time-keeping people, stopwatch/timer, hallway, measuring at the
heel, same starting line
UV: walking in a straight line, not consistent speed, time-keeper, misreading meter stick, people
in the way, unable to stop,
IV stand for Independent Variable, DV stands for Dependent Variable, CV for Controlled Variable and UV, for, yes, you guessed it, Uncontrolled Variable. A UV is basically an error while a CV is something you try to keep the same.
Answer to the question:
"What could we learn if we could see every one's data?"
We could learn: that no one has the same data, who can walk the farthest, least far, fastest, slowest, average of all the data of 7th grade, distance and speed ratios for all the 7th graders.

THE NEXT SCRIBE IS GOING TO BE.......
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REZA!

Test Run During Class

This is where I would write my Scribe Post.

Scribes of 7th Grade

Gio               Antonia               Vance               Iva
Laura            Bryce                  Viktor              Erik             
Noam            Emilie                 Alix                Reza             
Fabi              Cip                      James              Kat