Lab+2+Matter


 * 1. Measuring density by weight and volume**

METHODS: 1.I used a scale to find the mass of the object in (g) grams. 2.I used a metric ruler to get the radius which is diameter dived by two and then used this formula: to compute the volume of my items. For the Quarter I had to use the formula of a cylinder: 3.I computed density by using the formula: 4.For the stick of butter I had to use the rectangular prism formula:
 * V sphere = 4/3πr 3**
 * V cylinder = πr 2 h**
 * Density = mass (grams)/volume (cm3)**
 * V rectangular prism = length x width x height**
 * Weight and Volume**
 * object: name || weight (g) || volume*3 || density g/cm*3 ||
 * 1. round wooden peg || 47 || 65.45 || .71 ||
 * 2. marble || 21 || 14.14 || 1.48 ||
 * 3. quarter || 6 || .41 || 14.63 ||
 * 4. stick of || 99 || 108 || .91 ||

MATERIALS: scale, metric ruler, a round wooden peg, marble, quarter, and a graduated cylinder. METHODS: 1. I used the scale to find the mass of my objects.
 * 2.Measuring density by weight and displacement**

2.I poured water into my graduated cylinder at 200 ml.

3.I put my objects in the cylinder and found the difference. I repeated steps 2 and 3 for every object.

4.For every object divide the mass by its corresponding volume.

5.I compared the volume of the round wooden peg to the volume found in part one, and found that my calculation were off.

6. Then I used the stick of butter and found its volume and density. The stick of butter is the controlled.


 * Weight and Displacement**


 * Object: name || weight (g) || displacement ml || density ||
 * 1. round wooden peg || 47 || 64 || .73 ||
 * 2marble || 21 || 15 || 1.4 ||
 * 3. quarter || 6 || .50 || 12 ||
 * 4. stick of butter || 99 || 96 || 1.03 ||

Measuring is less accurate then displacement because one can do the math wrong or the measurements can be off. On the other had a graduated cylinder does not have any decimal points. It could work if the measurement of anything else was a ratio of some sort, but 1 ml =1 cc certainly makes it easier to calculate. Click Here
 * Is measuring more or less accurate than displacement?**
 * Would displacement work if 1 ml of water was NOT equal to 1 cc?**
 * Do a Google search to find out how many ml is equal to 1 cup of butter.**
 * 3. Challenge in the lab or at home:**

red lines is the boiled water purple lines are tap water boiling water pot
 * (1) Does the pool's level of water rise, lower, or stay the same?**
 * Hypothesis:** The level of the water will stay the same because at first the rock was in the on the water. If the rock is thrown into the water the density or displacement will amount to the because no mater where the rock is in the lake it still amounts to the same displacement.
 * Conclusion:** displacement/density of the water did not seem to change.
 * (2) Why is one ice cube clear and the other cloudy?**

left side: cloudy right side: clear
 * Answer: Click** Here