Tuesday, September 18, 2012

ph2 balance lab

we did a couple of experiments with this lab. We used tum's and crushed them into pieces. Then we had a few liquids that we used. We had vinegar, water  baking soda, and sugar. We had to check the pH balance on all of those liquids. As you can see from the chart how much the balance was on each one.

After we checked the pH balance we mixed the substances together and it bubbled and made a purple substance. After  it fizzled down it left a thin layer of skin on the top of the beaker and the rest of the substance had drained to the bottom.
 This is when the substance was bubbling and changing colors
This was the top thin layer of skin that the substance left in the beaker

The top layer of skin looked like gum. This substance was made with crushed up tums and added vinegar. We tried to have the same result when we used a different substance with vinegar and it did not work. It just fizzled and turned into white liquid.

Properties of water lab

In this lab that we did, we had 3 parts in this lab.  In all three parts of this lab we used water, for our first blog we used pennies. We used the eye droppers to  see how much water droplets we could fit on one side of the penny. My first score was 35. I did it a second time and i got a 27. After this i cleaned the penny  and  filled the eye dropper with alcohol. When we did this i recorded my score at 25, the second time i did it i got 20.
    Our second lab we did was with string and beakers. we had one beaker full of water with the other one empty. Then our objective was to get the water from one beaker to the other  using a piece of string. First we wet the string so the water could travel on it. Then we stretched out the string and starting pouring the water out into the other one.

Our third lab we had we used water with wax paper and a toothpick. We put a puddle of water on the wax paper and we had to separate the puddle   using a toothpick.

Monday, September 3, 2012

Understanding science

There is more to science than observations and hypothosis's.Its more about the experiments and understanding the consepts of everything we do. we do these experements for a reason. we learn from them and they help us with future things in this class. Mostly everything revolves around our testing idea's.  There are many routes you can take in the process in science, like technological develpment and observations and evidence and a hypothosis. In the experement the infestation is the dependant variable because when you use them it counteracts with how the corn grows. If it grows healthy with little or no infestation. or it grows badly with a lot of infestation, and when you weigh them there is a big differance.