Gravity Lab Investigation

Problem: Which ball will take longer to reach the ground, if dropped from 1 meter, 2 meters, and 3 meters?

Hypothesis: The Ping Pong Ball will take longer to get to the ground because it is lighter than the Golf Ball and is more affected by wind resistance.

Materials: Computer
Vernier Software
Logger Lite
Motion Sensor
Golf Ball
Ping Pong Ball
Meter stick
Styrofoam

Observations/Results: Our results looked like this:

	Golf Ball	Ping Pong Ball	Average
1m	0.21 0.21 0.16	0.31 0.26 0.20	GB: 0.19 PPB: 0.26
2m	0.37 0.36 0.27	0.41 0.37 0.37	GB: 0.33 PPB: 0.38
3m	0.73 0.72 0.57	0.93 0.83 0.82	GB: 0.67 PPB: 0.86

Here is the golf ball at 3 meters


This is the golf ball at 2 meters

This is the Golf Ball at 1 meter

This is the Ping Pong Ball at 1 meter

Yeast Beasts in Action

Title: Yeast Beasts in Action

Hypothesis: The pressure will change, either rise or fall, depending on the type of material.

Results/Conclusion: When we mixed the yeast (Base) and the Hydrogen Peroxide, the pressure went from 97.3056062012 kPa to 109.000784424 kPa. This shows that the base produced a chemical reaction with the Hydrogen peroxide, and there was gas released, creating pressure. During our second test, with the neutral (Milk), the pressure in the test tube went from 97.3162446289 kPa to 97.6460358887 kPa, which shows that nothing was happening to change the pressure inside the tube. The pressure stayed generally the same, which shows that there was no reaction. With the acidic substance (Diet Soda), the pressure rose from 97.3233369141 kPa to 98.8800935059 kPa, which shows a reaction, but not a big one. This means that the pressure rose, but only by a one point. In the end, I would have to say I accepted my hypothesis, because it did happen. The pressure was changed and affected by the different substances we used. Yeast can make things rise. That affects me in real life because I like to cook, and without yeast we would not have bread. At the neutral test, I hit collect after the pressure was being accumulated, but that probably didn't affect anything because the pressure stayed the same throughout the whole test.

Questions: 1. We did our experiment wrong by adding peroxide to all of them instead of yeast. I realize our mistake, but I do not have an answer for this question.

2. We did our experiment wrong by adding peroxide to all of them instead of yeast. I realize our mistake, but I do not have an answer for this question.

3. From what we did, the one with the yeast in it was the strongest.

Conservation of Mass Lab Investigation

Title: Conservation of Mass Lab Investigation

Problem: What will happen if we mix soda and pop rocks? What about baking soda and vinegar?

Hypothesis: If we mix soda and pop rocks there will be a large amount of gas released. The same thing will happen with baking soda and vinegar.

Results: In the first part of my video, entitled "First Test- Soda/Poprocks" you see Chloe putting a balloon on the top of a bottle of Pepsi. You may ask yourself, "why is this strange thing occurring?" Well, this is an experiment testing what will happen when pop rocks are added to Pepsi. When she puts the balloon on the pepsi, you see that the balloon inflates a little. The reason for this is the gas escaping is the occurrence of the desolving of the pop-rocks, which contain carbon dioxide. The gas is released into the balloon and the balloon inflates. In the second part of the video, chloe is putting the balloon onto a bottle of vinegar, and the same gas escapes again. This is the result of a chemical reaction that happens when the baking soda, that is in the balloon, and the vinegar, that is in the bottle, mix, and are converted into carbon dioxide, which is released into the balloon. In the first one, with pepsi and pop rocks, there was but a physical change, but in the second one, with vinegar and baking soda, there was a chemical reaction.

Video:

Chemical Reactions and Temperature Lab Investigation

Title: Chemical Reactions and Temperature Lab

Problem: How will the reaction affect the temperature?

Hypothesis: The reaction will change the temperature in some way.

Materials: A: 500 mL beaker

B: 1 Graduated Cylinder

C: 1 Thermometer

D: 3 Alkaseltzer Tablets

E: 1 Hot Plate

F: Watch or Clock

G: Ice Cubes

Results: When we did the room temperature test,

ChemThink: Chemical Reactions

There are three different types of reactions that were made.

1. Reactants

2. Products

3. Chemical reaction

4. Rearranging

5. breaking old bonds, forming new bonds

6. Atoms

7. New,

8. rearrange

9. 2, 2, 1, 1

10. 2, 1, 2 H=4, O=2, H=2, O=1

11. Law of conservation of Mass

12. Cu and O atoms.

13. 2 Cu + 02 = 2 CuO.

14. Reactants: 1 Cu, 2 O- products: 2 Cu, 2 O.

15. CuO.

16. Cu, O2.

17. 2 Cu + 02 = 2CuO.

18. 1CH4 + 2O2 + 2H20+ 1CO2.

19. 1N2+ 3H2 = 2NH3.

20. 2KClO3 = 2KCl + 3O2.

21. 4Al + 3O2 = 2Al2O3.

1. Reactions and products.

2. the same atoms present before and after the reaction.

3. coefficients, atom

Polymer Lab Group Investigation

Title: Polymer Lab Group Investigation

Problem: What will happen to the glue polymer if we add more glue?

Hypothesis: If we add more glue to the polymer then the polymer will be stretchier.

Results: The original materials and amounts didn't work at first, it ended up being too much glue. What happened then was that we had to add more borax-water solution, it worked out much better, and held together perfectly fine. When we stretched it, it was more stretchy, because it held more moisture. Also, it bounced 2 centimeters, and then after cooling it bounced 4 centimeters.

Polymer Investigation Part 2

Problem: How can we make a polymer?

Hypothesis: We can make a polymer by stringing together monomers.

Materials:

A. 12mL Sodium Silicate Solution

B. 3mL Ethyl alcohol

C. 2 small beakers

D. 1 Stirring Rod

E. 1 roll paper towels

Observations:

When the alcohol was added to the Sodium silicate, the solution almost instantly turned into a crystalline, type of plastic, though it was still a crumbly substance. This solid was not easily formed like the plastic substance of Tuesdays lab. When we tried to form it, it was too dry, and we had to moisten it with about a teaspoon of water. After that, we formed it quite easily. At room temperature, the ball bounced almost 20 centimeters, and at a cooler temperature, it bounced about six centimeters. My hypothesis worked because I was able to make a polymer by stringing together monomers.

Question and answers:

1. What characteristics are similar, and what characteristics are different between your two types of polymers you have made?

There are many differences. The first one I can think of is that the one from today bounced higher than the one from Tuesday. Another one is that the one from Tuesday was bigger, was stretchier, and was whiter.

2. Most commercial polymers are carbon based. What similar properties do carbon and silicon share that may contribute to their abilities to become a polymer?

Silicon and Carbon are made of the same chemicals, and are atomically similar, meaning they have the same atomic structure.

3. Plastics are made of organic polymers. What similar properties does the silicone polymer share with the plastics?

The plastics are made of the silicone polymer.

4. How did you know that a chemical reaction occurred when the two liquids were mixed?

A chemical reaction creates a change in the state of matter. The matter changed from a liquid to a solid.

5. How could you find out what liquid was pressed out of the mass of crumbled solid as you formed the ball?

You could repeat the test in a way that would allow you to detect what liquid is emitted from the ball.

6. Compare your ball with those of the other members of the class. How many differences can you see? List them.

The other balls were bigger, and more spherically shaped. Ours was small, with many flat surfaces. Ours bounced higher, probably because the matter was packed tighter and was more dense.