How can density be used to identify an object?

The National Science Resources Center says that density is one of the characteristic properties of an object, which, when compared to the densities of other known objects, allows an investigator to identify the materials from which it is made. While several materials may have similar densities, this property allows an individual to rule out unlikely candidates and use further tests to confirm identification.

Reference.com defines density as the ratio of an object's volume to its mass. Several factors affect density and it sometimes varies slightly from one sample to the next. Density varies with temperature as many materials expand upon heating. In addition, the density of a gas increases as pressure increases. When speaking of the density of a gas, scientists often specify the standard temperature and pressure to eliminate these variables. Managing these conditions is essential if one is using density to identify a gas.

Specific gravity relates to density. It is the ratio of the material as compared to water and carries no units. About.com says objects with specific gravities greater than 1 sink in water, while those with a specific gravity of less than 1 float. This quick test of nonsoluble items helps to eliminate possible choices when identifying a solid.

Q&A Related to "How can density be used to identify an object?"
 divide the objects mass by its volume. http://wiki.answers.com/Q/How_can_you_use_the_calc...
 An object that is less dense than http://www.chacha.com/question/how-can-you-use-den...
 1. Bring the shape to the top of the stacking order. 2. Select both the text and the shape. 3. Choose Object > Envelope Distort > Make with Top Object. http://www.quora.com/How-can-I-use-Adobe-Illustrat...
 Solar energy can be used to generate electricity, which will then drive machinery of all kinds, including vehicles. Most fossil fuel (coal, oil and natural gas) is also used to generate http://wiki.answers.com/Q/How_can_solar_energy_be_...
Top Related Searches
Explore this Topic
In order to measure the density of an object first you would place the object on a scale and get the weight (a pretty good approximate of mass). Calculating the ...
To calculate density you will need to know that density is the mass of an object divided by its volume. Grams is a mass and the volume is cubic centimeters. ...
Management by objectives is a business model that encourages a team collaboration committed to achieving a company's mission. Each management level identifies ...