The Destiny of Density

|Alex J. Prottengeier | Block 7 | Physical Science|

What is Density?

Density is a physical property of matter, and can be calculated by dividing the mass of the object by the volume of the object. Density is measured using cubic centimeters.

My hypothesis:
If my item's density is less than 1.0, then my item would float in fresh water.

Steps to find the Density of your solid object:

1. Measure the mass of your object - You will need to get an electronic scale and make sure that it is set at zero. You can then set your object on the scale and wait for it to calculate the mass of that object. If you need to put your item in a container or case to measure it, put the case on the scale, wait for it to calculate, and press the "tare" button. his will set the scale back to zero. Then just place the object in the container, wait for the calculations, and write down the mass of that object (measured in grams).

2. Measure the volume of the object - There are two ways that you can measure the volume of your object. First of all, if your item is in the form of a square or rectangle, you can multiply the Length, Width, and Height of the object together. This will give you the volume for that object. Unfortunately, this method will not work for any other type of object. Instead, you can get an overflow can and a graduated cylinder, fill up the overflow can, and set the can on the side of the sink or in the bin. After you let the overflow can drain out any excess water, you will put the graduated cylinder under the nozzle of the overflow can. Then you slowly put the item in the overflow can (if it floats, you will have to hold it down until it is under the water). Then you can see how much water dripped into the graduated cylinder. The marks on the side of the Graduated Cylinder are the measurements for volume (mL). How much water is in the cylinder is the volume of your object!

3. Measure the Density of the object - You first need to know the equation for density, which is mass/volume. This means that you divide the measurement for mass by the measurement for volume. After dividing the mass and the volume, you can record the results of the equation and round the 3rd number from the decimal point (for example, if the result was 0.23564, you could round it to 0.236). Then you have the density of your object (cm3)!

My solid object:

I was given a piece of a Styrofoam brick for my solid object. Here are the measurements:

Mass: 1.7 grams

Volume: 62 milliliters

Density (Mass/Volume): 0.0274 cubic centimeters

Since the density of my object was less than 1.0, then my object would float! That means that my hypothesis was correct!

More Facts (related to Density):

Did you know that 1 gram = 1 milliliter = 1 cubic centimeter?

Did you know that if the density of an object is less than 1.0, then that item will float?

Did you know that cube - like objects are called regular objects, and that other objects are called irregular objects?

Did you know that the density of water is 1.0?


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