Day 6: Atoms and Paperclips

                  In class today we learned about pure substances and mixtures. We made a graph in class and i think it helped me understand this kind of stuff so im going to recreate it down below.

                                                                              Matter

                                                  _________________|__________________             

                                                  |                                                                       |

                                 Pure Substances:                                                        Mixture:

                    A substance that's smallest pieces                             Different types of atoms or 

                           are the same. Can be:                                        molecules that are physically 

                        Monatomic- single atoms                                         mixed together, but are not 

                Diatomic- atoms boned in groups of 2                                 chemically bonded.

             Polyatomic- atoms bonded in groups of 3+                            ________| _________

                        ____________| ____________                                  |                                   | 

                        |                                                |                        Homogeneous:           Heterogeneous:                         

                Elements:                               Compounds:             A mixture that has      A mixture that has 

          A substance that                    two different types           the same makeup.    the same makeup, but

         contains only one                   of atoms present in                                               can have different

             type of atoms.                     the same molecule.                                                     amounts.           

             ______|______                                     |                                                                                                   

             |                        |                             molecules:          

       Atoms:            Molecules:             Two or more atoms that

   the smallest        two or more             are chemically joined  

  basic unit of       atoms that are           together. Can be more 

   a chemical       chemically joined       than one kind of atom.

     element.       together. Can be only         (H2O, CO2)

        (Cu)            one kind of atoms.

                                 (H2, O2) 

               We also did a paper clip lab. In the lab we basically attached different paperclips together to make molecules. This is a picture of my groups molecules.

 the next scribe is Nazia L.

Observation Lab, Unit #1

By: Charles W

               In class on Monday, we finished testing the reactions of mixing 3 different chemical substances. The mixing of Calcium Chloride, Sodium Bicarbonate, and Phenol Red created reactions that we observed and recorded. These reactions included:

     

                                                - Mixture turning yellow

                                                - Mixture foaming/fizzing

                                                - Mixture heating

Before we mixed the substances, we observed each one and recorded our observations.

      Observations:

                               Calcium Chloride          Sodium Bicarbonate          Phenol Red

                                  -White                          -White                           -Red/Orange

                                  -Solid                           -Fine                             -Liquid

                                  -Beads                         -Powdery                      

   After we mixed the substances, we tested each paired with another (EX: CaCl and NaHCO3) until we were able to tell which substance was responsible for which reactions.

    My lab group decided, based on our data, that Phenol Red caused the color change, the Calcium Chloride caused and increase in heat, and the Sodium Bicarbonate caused the foaming. 

    Some questions my lab group came up with regarding the experiment follows:

           

                       - Are these chemical or physical reactions?

                       - How would the reaction differ if one component was missing?

                       - What caused the foaming?

   Some of these questions were answered, thanks to further experimentation.

Some pictures related to the experiment:

  

The Reaction after mixing ...

Remember to wear safety goggles!!!

Showing Before and After...

HOMEWORK TONIGHT:   Write conclusion for observation lab (paragraph)  QUIZ Friday!!! and web assigns!

Next Scribe: ***Jessie W***

Get Lab Books if you Have Not Already!!!!! 

Achtung Baby

Today was all about safety. Our discussion centered around the Flinn Scientific Safety Contract. Also we watched clips from the ACS safety video. The first part of the discussion talked about appropriate laboratory attire and behavior. The movie clips were hilarious but informative as Mr. Lieberman was able to link them to our classroom. 

The shorter clip had to do with good lab techniques. There are several points that I think are worth highlighting.

1. The video made a point of telling us that it is always smartest to pour liquids from large stock bottles into smaller containers that are easier to manage in the lab.

Ahh...the memories

2. The point of mixing acids is an important one but not done very often in our class. Acids should always be poured into water, not the other way around. "Do what you outta pour the acid into the watta" I know lame but I learned that in high school myself.

3. The video also commented on how we always pour out of stock bottles but never back in. If you have too much of a chemical dispose of it properly but do not put it back into the stock bottle.

4. Remember never mouth pipet!!


The next scribe will be Charles W.

Scribe List

Jake A. Emma B. Stacie C. Cody D. Katie H. Bram H. Brittany J.Autumn K. Nazia L. Kevin L. Alex L. Jeff M. Danny N. Jae O. Eddy R. Zach S. Christine S. Danielle S. Courtney S. Rachel S. Yada T. Charles W. Jessie W. Chris C.

Creating A Post

The video below will help you with how you create a post in our class blog:

Every post should have at least three labels:
  1.  Your user name (no last names)
  2.  unit number (unit #1, unit #4, etc)
  3.  the topic addressed in the post

Digital Ethics

Blogging is a very public activity. Anything that gets posted on the internet stays there. Forever. Deleting a post simply removes it from the blog to which it was posted. Copies of the post may exist scattered all over the internet. That is why we are being so careful to respect your privacy and using first names only. 

There are four principles from which we will operate as we create digital content that will be posted on the internet.


1.  Students using blogs are expected to treat blogspaces as classroom spaces. Speech that is inappropriate for class is not appropriate for our blog. While we encourage you to engage in debate and conversation with other bloggers, we also expect that you will conduct yourself in a manner reflective of a representative of this school.


2.  Never ever give out or record personal information on our blog. Our blog exists as a public space on the Internet. Don’t share anything that you don’t want the world to know. For your safety, be careful what you say, too. Don’t give out your phone number or home address. This is particularly important to remember if you have a personal online journal or blog elsewhere.


3.  Again, your blog is a public space. And if you put it on the Internet, odds are really good that it will stay on the Internet. Always. That means ten years from now when you are looking for a job, it might be possible for an employer to discover some really hateful and immature things you said when you were younger and more prone to foolish things. Be sure that anything you write you are proud of. It can come back to haunt you if you don’t.


4.  Never link to something you haven’t read. While it isn’t your job to police the Internet, when you link to something, you should make sure it is something that you really want to be associated with. If a link contains material that might be creepy or make some people uncomfortable, you should probably try a different source.