It Came From the Media: What Prompted the Ruckus about "Pink Slime" And Is It Unhealthy?

        Michael Moss and Amy Hubbard are two people involved in the process of figuring out weather or not the pink slime on meat is unhealthy or not. There is pink slime on beef, but it also could be unhealthy. Pink slime is generally the fat and meat removed from standard meat cute. Scientists that the pink slime could be unhealthy, and there could be unwanted things inside it. It could also be healthy, we just hadn't figured that out yet.
        I think that scientists should develop different methods into finding out weather the pink slime is healthy or not. Some people can be eating the pink slime but it can be extremely unhealthy. But also for the people not eating it, it can be extremely healthy but we just don't know. The soupy meat slime through a thin tube. Then there is some ammonia gas. Afterwards the ammonia gas reacts to form ammonium hydroxide. This decreases acidy and kills any pathogenic germs in the meat. They should find out if the pink slime is healthy or not so it wouldn't be dangerous if we did eat it or if it could help us if we do eat it.

http://blogs.discovermagazine.com/crux/2012/03/23/it-came-from-the-media-what-prompted-the-ruckus-about-pink-slime-and-is-it-unhealthy/

Blog: States of Matter

rIn the past week, we did many labs and learned many things. First, I would like to explain the difference between physical changes and chemical changes. 


a. A physical change is the change of form or appearance of a substance. It's composition or identity does not change. 


b. A chemical change occurs when a substance changes into one or more new substance.


Burning Out A Candle:
The first experiment we did was blow out the fire on the candle with gas. We created a gas by adding baking soda to vinegar and putting it close enough to the flame to diminish any oxygen from the flame, causing it to burn out. The first time, we messed up putting too much of each which overflowed and touched the candle, forcing us to do to again. But in the end, we created a gas which just by placing near the flame, will burn out. This is a physical change because the fire was burned out by the gas, which is a change of form/appearance of the substance.  (Not so sure, but I think it could be a chemical change because after burning it it created a charred substance.)
                                            
                                            Roasting A Marshmallow:
The second experiment we roasted a marshmallow on a bunsen burner. We burnt one part of it, leaving it charred, and the rest was a golden brown (so gooey on the inside). We tasted the charred part, and to it tasted really bad (like solid smoke) but the golden brown was not roasted too much and tasted very good. This is a chemical change because we burnt the marshmallow with fire, causing the charred area to appear, creating another substance.

Burning Sugar: 
We placed sugar into a test tube to burn it. We placed it above the bunsen burner. The color changed very quickly, from white, to carmel, to black. After a while a huge puff of yellow smoke came out of it so we took it down. As Mrs. Rousseau broke the glass, we had to observe it. It looked like black honey, it was dark and smooth and hot. It was also partially gooey. We did not get a good chance to feel it first so we tried to take the glass off of it (causing me to get glass in my finger), and got a better feel of it.

Separating A Mixture

1. Remove water from cup into filter on top of beaker, into the beaker.
2. Use spoon to scoop up the sand and put on tray. Then take beans from cup onto tray.
3. Put 1/4 of the water into flask.
4. Put beaker with water onto hot plate and heat (high).
5. Separate stick and bug from the cup onto the tray.
6. Use magnet to remove metal.
7. Remove beaker from hot plate, which should leave you with salt on the bottom.

The items you should be left with are: Water, beans, sticks, plastic bug, metal, sand, and salt.

Frog Dissection

In class, we dissected a frog named Wendall. First we cut off the skin then had to cut off the muscle under it, while breaking bones in the process. Since it was a female, we took out the eggs. We also looked at the heart which was a clear sac like organ. When the frog breathes, it expands like so:

Lower, was the liver, (when you cut it out, it smelled really bad.) Under the liver was a green little sac, which was the gall bladder. The liver creates bile and the gall bladder stores it. The stomach was next to the liver, and sometimes when you cut it, you can see the frogs last meal. Here is a diagram:

Original Website: http://www.frog-life-cycle.com/diagram-frog-anatomy.html

The frog's digestive system and respiratory system are a lot like a humans, with minor changes. When we cut the frog open, I almost immediately knew where everything was. The frogs skin and muscle was very thin, and if you looked on the inside, you can see the blood vessels. We also noticed that in the liver took up a great part of the frog, besides the eggs which also took up the other side. I wondered, why did the liver have to be so big? After we removed the liver and eggs, there wasn't much left. (Sorry about the way this section is spaced out, my computer is having issues.)

Frog Dissection
by: babysaad2

I also remember, how we thought the small intestine was the stomach, so we cut it up. We didn't get a chance to get a good look at the intestine though, so I don't really remember what it looks like. After we cut what was actually the stomach, there was nothing in there. It looked like a stitched up kidney bean.

Here is an online dissection game:
http://www.surgery-games.org/43/Dissect-a-Frog.html
This game is online dissection in which you then have to identify the individual parts.
 

Respiratory System

Click it ONCE, and it will automatically enlarge.

As The Stomach Churns Lab: Part 2: Day 2

In class, we looked at the test tubes from the day before. Test tube A, the egg white clumped and froze. When we put a stirrer in and put it on the Litmus paper, nothing happened. Test tube B, the egg white is gone and the pepsin went to the bottom. When we put it on the litmus paper, it was like sugar on paper, then slowly dissolved into the paper, making it wet. Test tube C, nothing happened to the solution and when we put some on the litmus paper, the paper turned pink. Test tube D, the pepsin went to the bottom, and the acid went to the top, and the egg white shrunk. When we put some on the litmus paper, the paper turned pink.

As The Stomach Churns Lab: Part 1: Day 1

In class, we did a lab using egg whites and hydrochloric acid. We had four test tubes, A. B, C and D.
Each test tube had three pieces of egg whites. We also put something different on top of the egg whites in each test tube. In test tube A, we put 10 mL of enzyme pepsin on top of the egg whites.  There was no immediate reaction in the egg white appearance. In test tube B, we put 5 mL of water, and 5 mL of pepsin. The egg whites started bubbling. In test tube C, we put 10 mL of hydrochloric acid. There was no immediate reaction. In test tube D, we put 5 mL of hydrochloric acid and 5 mL pepsin. The egg white was melting slowly. We then took stirrers then put them in each test tube then on to blue litmus paper. Test tube A solution, there was no immediate reaction. Test tube B solution, the litmus paper gets wet. Test tube C solution, the litmus paper turns pink, because when the hydrochloric acid touches blue litmus paper it turns pink. Test tube D solution, turns pink and for the same reason.