Category: Science 10

Chemical gases and open flame lab

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Partners: Zayd , Alex

Uses for these chemical reactions can be used for the extinguishing of fires in small/medium scales using the hydrochloric acid and sodium bicarbonate. Also, for example during survival instances, you can use the hydrogen peroxide and potassium iodide for fire starting.

Part 1:  Calcium metal and water. When we combined them, it created hydrogen gas and the hydrogen gas was able to ignite the whole cylinder. This happens because is highly reactive with flames.

Part 2: Hydrogen peroxide and potassium iodide. When they combine, mass amounts of oxygen are released. This allowed the ember on the wooden stick to ignite into a full flame.

Part 3: Sodium carbonate and hydrochloric acid. The combination of the 2 makes carbon dioxide. This allowed for the fire to be extinguished very quickly and easily once dropped into the cylinder.

The first video is from Part 1. The second is from Part 4.

(To view the videos, click on them, then on the link if needed that pops down)

Part 1 – 1F08B82C-B88B-4F57-A3BC-73E47F5FA841-1fzgcf3

Part 4  – C8CF88E1-DADF-4B40-B8EA-EC780EE87A00-y78au1

 

Mendelian Gene : Marfan syndrome

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Marfan syndrome is a disorder that affects the connective tissue in many parts of the body. Connective tissue provides strength and flexibility to structures such as bones, ligaments, muscles, blood vessels, and heart valves. The signs and symptoms of Marfan syndrome vary widely in severity, timing of onset, and rate of progression.

The two primary physical attributes of Marfan syndrome are vision problems caused by a dislocated lens  in one or both eyes and defects in the large blood vessel that distributes blood from the heart to the rest of the body. The aorta, the large blood vessel, can weaken and stretch, which may lead to a bulge in the blood vessel wall. Stretching of the aorta may cause the aortic valve to leak, which can lead to a sudden tearing of the layers in the aorta wall (aortic dissection). Aortic dissection can be life threatening.

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Scientific Method Bubble Gum Lab Conclusion

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Bubble size conclusion :

Big League blew bigger and better bubbles. The reason is we believe that since there Hubba Bubba has more flavor/flavor ingredients, they focus less on the strengh and strech of the gum but rahter Big Leagues loses on flavor, but provides better gum for blowing bubbles.

Hubba Bubba :                                                                                           Big League :

1st = 5cm    2nd = 9cm     3rd = 12cm                1st = 9cm      2nd = 13cm      3rd = 10cm

Strech test conclusion :

The strechability is opposite compared to bubble size. The bigger the bubbles, less strech. Smaller bubbles, more strech.

We noticed 5 factors that may have changed the outcome ofn the strech test :

  1. Different chewing techniques
  2. Longer chewing for Gum A since it started about 3 minutes before Gum B
  3. Different ingrediants in the different gums
  4. Body Temp/Gum temp. Reasons is like rubber or silly putty, when it’s cold it’s harder to strech
  5. Speed of pulling/Amount of tension
  • SI Units were used in this lab. The units were meters(m), centimeters(cm) and grams(g).
  • We used qualitative data for writen conclusions and to develop our hyposethies.
  • We also used quatitative data for the charts and the way we recorded our data from the tests

Partner : Zayd