Science February 23rd and 25t

Balloon rocket final!

On Tuesday our class worked on our balloon rocket designs. Trying to come up with the perfect designs for their categories(categories shown in previous post). The whole class was spent doing this.
Then on Thursday we tested our final design.

The competing teams were



Alix, Vance, and Cip competed for farthest and fastest.

Fabi,Gio, and Emilie competed for farthest and fastest

Noam,Kat, and Erik also competed for fastest and farthest.









Iva, Antonia, and Lara (who was absent Thursday) competed for going 4m forward and then come back









Bryce, Reza, and Viktor also competing for the direction changing rocket.





Unfortunately every team had some sort of bad luck throughout the testing.

Results!!!

Farthest and longest were won by Cip, Vance ,and Alix by a fairly large margin. They were followed by Emilie, Gio, and Fabi. They were in turn followed by Noam, Kat, and Erik who experienced very bad luck

Forward and back was tied because neither teams design worked during the three rounds we were given.

After this Ms. D went over the lab conclusion which is due Tuesday, March 2nd.

Right before we left our Quests from last week were returned to us and we were either happy or sad about the grade.

The Next Scribe is Alix!!!!

Blog post before the break

Hello, in this blog post I will be covering the 2 days before the winter break (Thursday and Friday).

On Thursday, the class took a test on forces, such as Newton’s laws. The test consisted of math questions, think questions, force diagrams, definitions and two bonus questions. This time Ms. D made the test infinitely harder to cheat, by making three separate versions of the tests. (Alpha, Beta & Eta)

On Friday (the short period) we were put back into our groups. (Reza, Bryce, and Viktor

Alix, Vance, and Cip

Laura, Antonia, and Iva

Fabi, Emilie, and Giovanna

Noam, Erik, and Kat)

In our groups we continued to toil on the task of making our balloon win the competition. The categories were: the furthest flight, the fastest and to make your balloon go out at least 4 meters and come back. Enjoy your break!

the next scribe is Bryce

Science Class on the 4th of February, 2010

Hey Everyone,

Yesterday we started our balloon rocket projects. Don't forget that this is a competition. There are three categories that we should try to go for. They are the fastest, the farthest, and the balloon that can go and come back in the opposite direction. On Tuesday we will be continuing this Challenge.

The pairs are (in case you forgot):

Reza, Bryce, and Viktor

Alix, Vance, and Cip

Laura, Antonia, and Iva

Fabi, Emilie, and Giovanna

Noam, Erik, and Kat

Something we did in class was that we checked the momentum math sheet #2. Momentum math sheet 2 was a sheet that you could have used the text book.

Don't forget we have a quest next Thursday. It is on forces NOT motion.

The next scribe is Vance

Hello 7th graders, Ms. D, and any other reader!

Today in class we went over our labs and what we were supposed to include in our conclusion. Also we got the labs back graded. After this we talked about Newton's firs law challenge. What we actually did that day is discover and better understand what Newton's first law states. We got these back graded too.


For the second part of our class we went over our homework that had momentum math problems. One of those problems would look something like this:

1. A rock with a mass of 5 kg was thrown by an athlete at a speed of 20 m/s, what is the rock's momentum?

Formula: MOMENTUM=MASS x VELOCITY (also known as p=mv)

Plug: p= 5 kg x 20 m/s (important here is not to forget the units!)

Chug: p= 100 kg-m/s (the units that momentum is measured in is "kg-m/s", you say it kilograms meters per second)


A little more challenging problem would look like this:

2. A toy car has a mass off 1kg, and it is moving at a speed of 10 m/s, it hits another car with the same mass which it attaches to and continues moving. What is the momentum of the car before it collided and what is the speed of both cars after they collide?

-Question 1 (What is the momentum of the car before it collided?)

Formula: p=mv

Plug: p= 1 kg x 10 m/s

Chug: p= 10 kg-m/s


-Question 2 (What is the speed of both cars after they collide?)

The speed of both cars after they collide is 5 m/s because since both cars have the same mass than the speed that the first car hit the second car with will be evenly split between the two. This can happen only when the cars have the same mass.


Our homework is another paper full of wonderful momentum problems.






To finish up this post i would like to encourage everyone in my class to start a tradition and everytime you are the scribe to put a quote of someone we are studying now such as Sir Isaac Netown, Stephen Hawking and many more. THE NEXT SRIBE IS REZA.

“No great discovery was ever made without a bold guess” Sir Isaac Newton