RRCS MOBILE
 HELP WITH DENSITY Here are a few hints and websites to help you measure DENSITY of objects... *HOW TO FIND DENSITY....... *DENSITY = MASS / VOLUME By following these simple steps, you will eventually be able to determine the density of any object.  Take out the yellow cube from your density kit.   Put the cube on the scale, you will measure it in grams.   Balance the scale and read the measurement in grams.  The yellow cube has a mass of  ____________ ‘GRAMS’. REMEMBER THAT WE WILL USE ‘GRAMS’ TO MEASURE MASS. Next, calculate the volume of the cube by measuring its LENGTH, WIDTH, and HEIGHTH.If it isan irregular shape, you can use'liquid displacement'. Fill the graduated cylinder to a level so the object can be completely submerged in the water. Take the measurement of the liquid BEFORE you drop the object in. REMEMBER TO ALWAYS MEASURE AT THE MENISCUS (MIDDLE PART OF WATER CURVE) AT EYE LEVEL. If it floats, you will need to hold it JUST under the top of the water without putting your finger or instrument in the water. Measure the liquid level after you have carefully dropped the object in. However many mls. the water went up is the volume of the object in cubic centimeters. LIST ITS LENGTH                    ______ CENTIMETERS LIST ITS WIDTH                       ______ CENTIMETERS LIST ITS HEIGHTH                   ______ CENTIMETERS NOW, MULTIPLY THE LENGTH  x  the WIDTH  x the HEIGHTH. (you may use a calculator!!!) Since it is 3 measurments multiplied together, your answers will be in cubic centimeters (CM3) since you are basically measuring how many cubes 1 centimeter high by 1 centimeter long by 1 centimeter wide will fit into that object if it was hollow. THE ANSWER IS      ________  CM 3     Next, take the mass ( _________grams) and divide it by the volume (___________cm3) And your  answer will be in grams/ cubic centimeter (PRONOUNCED GRAMS PER CUBIC CENTIMETERS). WHAT DOES THIS MEAN?????? It ,means that if you were able to magically take out a perfect cube  of your substance that is 1 centimeter high by 1 centimeter long by 1 centimeter wide, it would always have the SAME MASS as any other cube  1 centimeter high by 1 centimeter long by 1 centimeter wide in your substance. THAT IS DENSITY!!!!!  EVERY ELEMENT IN NATURE HAS ITS OWN DENSITY, MEANING, IF MAGICALLY, CUBES  1 centimeter high by 1 centimeter long by 1 centimeter wide were able to be taken out of a certain substance and put on the scale, the mass of those cubes would be identical for each particular element. NOW, USE THIS FORMULA AND WORKSHEET TO CALCULATE THE DENSITIES OF OTHER RECTANGULAR/ SQUARE THINGS FROM YOUR BOX OR FROM AROUND THE ROOM. WRITE DOWN ANY NOTES /DRAW PICTURES IN YOUR NOTEBOOK!!! FIND THE DENSITIES OF 6 OTHER OBJECTS. Here is a great website to help you practice measure just measuring the mass before moving onto volume or density: http://www.wisc-online.com/objects/index_tj.asp?objID=GCH202   Here is a great website to help you practice measure just measuring the volume before moving onto mass or density: http://www.wisc-online.com/objects/index_tj.asp?objID=GCH302   Besides looking on my website, here is another website with a powerpoint on density: http://169.244.183.37/~cfichter/docs/density%20powerpoint.pdf
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