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Monday, June 2

  1. page Atticus S sp2013 edited two types of experiments extension We have conducted an experiment to test what paper airplane…

    two types of experiments extension
    We have conducted an experiment to test what paper airplane has the best flight time. We conducted a comparison experiment .it showed that the best plane we tested was the interceptor it was in flight for 2.91 seconds. All the planes we tested were stunt plane they did a quick loop and then nose dive. The control was the bullet and had a average time of 1.99 seconds. The dependent variable was the plane. Our method was to throw threw plane at the recommended speed and timed it using a stop watch. When the stop plane hit the ground we stopped the timer. We threw the plane in a school hallway weaning a few of them hit lockers and hit the ceiling.
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    {ads power drill 1.PNG} before {ads power drill 2.PNG} after
    during this model sketch it was assigned to draw a model without research of any sort then research and redo I missed two things on the first model the battery size and the speed switch on the back the rest was well known to me as i work with the tool almst daily and had almost no trouble recreating it this was a however a fun assignment and easier than expected.
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    or lattices. table salt is a compound because it contains two or more elements sodium and chlorine. other kinds of slt include Epsom salt(MgSO4),
    Seperating salt from sand .
    Materials
    Salt and Sand mixture
    paper towel
    Two beakers 600ml
    Water 500ml
    stirring rod
    hot plate
    Coffee filter
    scapula
    Balance
    Rubber band
    We Started by pouring the water over salt and sand mixture into one of the .we mixed thoroughly until the salt dissolved( nothing else would go away) then then we set up the second beaker with the coffee filter using the rubber band. We then Poured the salt and sand mixture through the filter and waited for all the water to go through. We took off the filter, then we fliped the filter inside out and poured 100 ml of water through it into the first beaker(be sure to make sure almost All the water has gone through and the 1st beaker is almost completely dry) evaporate all the water using the hot plate at 400 degrees Celsius(not any higher or the glass is at a risk of shattering). We Weighed the beakers with and without the salt and/or sand to find out how much of each was in the mixture using the balance and documented results.
    We measured that the salt weighed
    1.9g and the sand weighed 3.4g. The salt looked like a white glass plate at the bottom of the beaker and the sand was almost exactly the same as it did when we put it into the beaker. The method we created worked and we got the results we needed.

    (view changes)
    6:46 am

Thursday, May 29

  1. page Helen C sp2013 edited ... When we separated the salt from the sand, we found that the sand weighed 3.4 grams and the sal…
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    When we separated the salt from the sand, we found that the sand weighed 3.4 grams and the salt weighed 2.1 grams. When we observed the mixture before we had separated the salt from the sand, it was a tan color. The beaker containing the salt and the sand was 19 grams altogether and the salt and sand mixture by itself weighed about 5.5 grams. During the process of separating the salt from the sand, the salt had dissolved into the water. When we filtered the sand, the salt water when straight to the bottom of the beaker while the sand was getting left behind in the filter. When we boiled the salt water, there were many different bubbles shooting to the top of the water. Eventually, the bubbles popped causing the water to make a popping sound. When the water was all boiled out, the salt was all spread out around the inside of the beaker and it looked like a flat sheet of dry, white paint with air bubbles on the top. This was a very interesting and fun experiment and the experience will be very memorable.
    {hc_method1.PNG} The illustration of my method to separate salt from sand. Part 1.
    {hc_method2.PNG} The illustration of my method to separate salt from sand. Part 2.
    (view changes)
    7:11 pm
  2. page Helen C sp2013 edited ... {hc_saltcrystal.JPG} This is a model of a salt crystal made out of marshmallows and toothpicks…
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    {hc_saltcrystal.JPG} This is a model of a salt crystal made out of marshmallows and toothpicks.
    Separating Salt and Sand
    First,When separating the salt from the sand, a 250
    When we separated the salt from the sand, we found that the sand weighed 3.4 grams and the salt weighed 2.1 grams. When we observed the mixture before we had separated the salt from the sand, it was a tan color. The beaker containing the salt and the sand was 19 grams altogether and the salt and sand mixture by itself weighed about 5.5 grams. During the process of separating the salt from the sand, the salt had dissolved into the water. When we filtered the sand, the salt water when straight to the bottom of the beaker while the sand was getting left behind in the filter. When we boiled the salt water, there were many different bubbles shooting to the top of the water. Eventually, the bubbles popped causing the water to make a popping sound. When the water was all boiled out, the salt was all spread out around the inside of the beaker and it looked like a flat sheet of dry, white paint with air bubbles on the top. This was a very interesting and fun experiment and the experience will be very memorable.
    {hc_method1.PNG} The illustration of my method to separate salt from sand. Part 1.
    (view changes)
    7:10 pm
  3. file hc_method2.PNG uploaded
    7:09 pm
  4. file hc_method1.PNG uploaded
    7:08 pm
  5. page Helen C sp2013 edited ... In science this week, we have been making a model of a sodium chloride crystal (table salt). T…
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    In science this week, we have been making a model of a sodium chloride crystal (table salt). Table salt’s chemical NaCl and in chemistry, salt is any chemical compound formed from the reaction of an acid with a base, with all or part of the hydrogen of the acid replaced by a metal or other cation (positively charged ion). A crystal is a solid that forms by a regular repeated pattern of molecules connecting together. A salt is considered a compound because it's a substance whose smallest unit is made up of atoms of more than one element bonded together. A few other types of salts are calcium carbonate, sodium carbonate, potassium cyanide, and sodium sulfide. Here is a picture of the salt crystal model that me and my lab partner made:
    {hc_saltcrystal.JPG} This is a model of a salt crystal made out of marshmallows and toothpicks.
    Separating Salt and Sand
    First, a 250 mL beaker was filled with 100 mL of water. Next, the salt and sand mixture in the small beaker was poured into the 100 mL of water. The water was stirred with a stirring rod for 30 seconds so that the salt would dissolve. Next, the coffee filter was curled onto the edges of a 600 mL beaker. The other 250 mL beaker with the salt water and sand, was slowly poured into the coffee filter pouring about 25 mL every time. Since there was still sand in the beaker, the scoopula was taken and it scraped all the sand out of the beaker and put through the filter. When all the water was poured out, the filter with the wet sand was placed into another 250 mL beaker. The beaker with the filter was placed on a hot plate at 100˚C for 5 minutes so that the water in the sand evaporated. Next, the salt water in the 600 mL beaker was also placed onto a hot plate at 100˚C and 20 minutes past until the water was evaporated all that was left was the salt. Finally, the sand was poured onto a sheet of weighing paper and the weighing paper was placed onto a triple beam balance and the mass of sand was found. The mass of the salt was found by weighing the beaker and the salt in it and then washing out the salt and weighing the beaker by itself. The mass of the beaker by itself was subtracted from the mass of the beaker with salt.
    When we separated the salt from the sand, we found that the sand weighed 3.4 grams and the salt weighed 2.1 grams. When we observed the mixture before we had separated the salt from the sand, it was a tan color. The beaker containing the salt and the sand was 19 grams altogether and the salt and sand mixture by itself weighed about 5.5 grams. During the process of separating the salt from the sand, the salt had dissolved into the water. When we filtered the sand, the salt water when straight to the bottom of the beaker while the sand was getting left behind in the filter. When we boiled the salt water, there were many different bubbles shooting to the top of the water. Eventually, the bubbles popped causing the water to make a popping sound. When the water was all boiled out, the salt was all spread out around the inside of the beaker and it looked like a flat sheet of dry, white paint with air bubbles on the top. This was a very interesting and fun experiment and the experience will be very memorable.

    (view changes)
    7:06 pm
  6. page Saavan Y sp2013 edited ... {sry_sandsaltxpt.JPG} Filtering the sand and salt mixture. The salt water was the filtrate, an…
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    {sry_sandsaltxpt.JPG} Filtering the sand and salt mixture. The salt water was the filtrate, and the sand was left in the filter.
    {sry_sandsaltxpt (2).JPG} Boiling off the water in the salt water and wet sand. This was done so that the sand and salt were separated and did not have any water left over.
    {sry_sandsaltxpt (3).JPG}{sry_snadsaltxpt.JPG} Finding the
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    2:32 pm
  7. page Elena H sp2013 edited ... The Separation Challenge: Separating Salt and Sand- To separate salt and sand, we first put t…
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    The Separation Challenge: Separating Salt and Sand-
    To separate salt and sand, we first put the mixture into the 80 mL beaker, then, we poured 50 mL of water inside of the mixture. After that, we stirred the mixture with a stirring rod so the salt would dissolve into the water and the sand wouldn't mix in. After that, we filtered the mixture so the sand would be stuck in the filter, and the salt water would be in the beaker at the bottom. The sand is then separated from the salt water and we measured the mass of it. Next, we boiled the salt water, to get the salt by itself and separated from the water. The water evaporated and we measured the mass of the salt.
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    the beaker.
    {swag fjdkaldfjd;a.JPG}
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    2:28 pm

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