Five Chemical Reactions

The five chemical reactions are

• Synthesis- is when two or more substances combine to form another more complicated substance 
• Decomposition- Opposite of synthesis, One substance breaks down into two or more simpler substances
• Single Displacement- Occurs when one element replaces another element in a compound
• Double Displacement- Two different atoms in two different compounds exchange places
• Combustion- A hydrocarbon reacts with oxygen, the products of combustion are always water + carbon dioxide 

Synthesis- when we lit the steel wool on fire
Fe+O2+-->Fe2+ O3

Displacement- nail in copper sulfate
Fe+CuSo4--> Cu + Fe2(So4)3

Trends in the Periodic Table

This week in class we talked and learned about the Periodic Table. The Periodic Table is organised by the type of metals. The most metallic metals are on the far right side, while the least metallic metals (gases) are to the far left. the middle group is called transition metals. A period is the metals going horizontal on the periodic table, a group is the metals going vertical. Electron Affinity sets a trend because the atoms above it are always larger. The trend of ionization energy is when the atomic number rapidly increases.

Flame Test Lab

Introduction: Some metal ions can be identified by the color of their flame during a flame test. Different elements placed into a flame will turn the flame different colors.

Essential Question: What metals do colors indicate?

When solutions of a metal get burned they give off a certain color. When elements are heated the electrons take that energy and and move to an outer energy level. You can use the color that the element changes to when heated to identify the element.

Law of conservation of mass

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In each experiment we tested the Law of conservation of matter. In the first one after trial after trial the mass before mixing went down and after mixing the mass went up, after mixing the chemicals looked like white gell. in the second experimentwhen we put the white tablet in water and then that made gas. the mass went down a lot after shaking the bottle. One difficult thing i had to deal with was makng the air not effect the expirement while finding the mass of the water bottle. I conclude that the Law of conservation of matter is true.

Elements of a star

Where do the elements of stars come from? Before we watched this video and read the packet i had no idea where the elements of a star came from. Over many years the scientists are trying to figure out what caused the elements of a star to form and be the way it is now. Now seeing how our stars have been formed i am very interested in the solar system now. The Universe has come from many years of trial and error.

The universes elements all came from many different things. Although scientists think it all came from one thing, a Super Nova. this is what made our universe. The main element in a star is Hydrogen, where this is found in most stars. Another cause of stars are Nuclear Fusion to form a strong nucleus. With out stars our Solar System would not be able to function.

Copper Chloride Lab

Proper scientific technique requires careful observations to make conclusions. This week we did a lab working with Copper Chloride.  here are my observations.

1. at first the water looked clear and the water was at 19 degrees Celsius.
2. added the blue powder like Sodium Chloride
3. upon entering the water the Sodium Chloride diffused
4. when the Sodium Chloride diffused the water turned green
5. the green water was clear
6. after fully dissolving and diffusing the water turned a murky grey/white water
7. after stirring the water vigorously the water turned back to blue but still murky
8. after that we put in a piece of tinfoil
9. as soon as the silver aluminum hit the chemical it started to bubble and turn brown
10. after putting in the tinfoil the temperature went from 19 Celsius to 21.5 Celsius
11. after stirring the chemical now with tinfoil in it we took the temperature
12. it went up to 25 Celsius
13. now after the stirring the was a pail blue
14. looked like there was sand on the bottom of it the beaker
15. when the chemical was in the beaker it was murky blue then after
16. after filtering the chemical was a pail clear blue
17. then we put the clear acid in a test tube
18. then we put clear acid in the chemical
19. the chemical foamed and started to turn back to blue
20. when I was watching it the chemical started to fizz and sizzle
21. there were a lot of bubbles
22. then it turned green

Oreo Cookie Lab

Oreo Cookie Lab
By: Jared, Pentucket Regional High School
 9/13/13

 Students measured the filling in three types of Oreo cookies to determine if the filling amounts matched the advertising. In Physical Science this week we did a Oreo Cookie lab. the lab was to see if the Mega, and Double stuff Oreo's really had as much filling as the label said there was. Our steps where to get the Oreo's, put the Oreo cream on the triple beam balance record the data. The mass of the mega stuffed Oreo was 9.740, The mass of the Double stuffed Oreo was 6.39, and the mass of the regular Oreo was 3.2. Before we measured the mass of the Oreo filling i did think that there was double the stuffing because when i looked at it at first the Oreo's looked like they had more filling. After this experiment i realized that my Hypothesis was right. Oreo Cookie Filling elements Planets cars disney presidents Original 2.2 3.4 3.2 3.2 o/o=1 Double stuffed 5.2 7.2 6.8 6.34 5.2/2.2= 2.36 Mega Stuffed 8.25 10.65 9.5 9.74 8.25/2.2= 3.75

Density and Measuring

Over this week we did a lot of things that taught me how to do specific things in the lab. One thing we did this week was the do nows. the do nows helped me figure of the mass, density, and volume of various objects. over the summer i forgot how to find the Mass, Density, and Volume but with the help of the do nows helped me remember. One do now we did was finding the density of pure solid copper, the mas and volume was already given to me, but i had to divide the two numbers to get the answer 55. 28. The do nows that we did this week helped me remember what to do when i have to find the Mass, Volume, and Density. Another thing we did this week was Labs. we did two labs, one was do bowling balls sink or float when we did this lab we has to find the density to understand why the ball floats and or sinks. The bowling ball lab helped me because it was the first lab i did after summer and helped me figure out how to do labs again. Another lab that we did this week was the gummy bear lab. The gummy bear lab we had to find the volume, density, length, width, and hight of the gummy bear. these labs helped me understand more about science and prepaired me for the rest of the year.

Why I Chose Physical Science

Why I chose Physical Science

 I chose Physical science because I either needed to pass either chemistry or physical science and I though this class because I though it would be more interesting. There are a lot of reasons that you should study Physical Science. One reason is that there is science in everyday life. Also you should know what is going on around you at every moment.