The first questions we should answer are: Is all proof matter? What is matter? how do us classify and also collect the matter that matters?

In gimpppa.orgistry together in many sciences, issue is identified as something that has mass and takes up space. Matter can as such be weighed and measured and also the numbers generated analyzed and also compared for the benefits of evidence or research. When we measure up the issue we will certainly use, it is essential to monitor the rule of collection and also computation that save the measurements in a kind that is capable of comparison. What I average by this is the you can�t weigh an item on a scale qualified of only measuring to the 0.1 gram however report it come the 0.001 gram. That would be claiming a degree of precision that does not exist in the measurement. The use of far-ranging figure rule will store us indigenous making this type of mistake. We additionally need to realize that few of the evidence we will collect both in research and in forensic examination is no in truth matter. Observations, while no a kind of issue are of significant value as soon as investigating. Observations autumn under a form of data dubbed qualitative data and are just as essential as quantitative (measured or calculated) data.

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Qualitative data is the observations investigator makes. While spatu in nature, this observations have value due to the fact that they frequently will assist an investigator beforehand decide what proof to collect or the basic direction an examination should go. Arsenal of qualitative data might include surveying witnesses or suspects, taking pictures of crime scenes or objects left in ~ a crime scene, etc. Because of the spatu nature of the data, over there is more difficulty in compare the results. We frequently say that data that this nature deserve to be supplied to type a consensus but never an absolute answer such as we would obtain in quantitative data due to the fact that of the problems with reproducibility.

Quantitative data is the arsenal of numbers. This numbers can be life counts like exactly how many people were current at a party or they might be dimensions like the fixed of an apple. The advantage to quantitative data is the is deserve to be reproduced and also is non-subjective in nature. This means if several different investigators test the measure up they need to all pertained to the very same answer in ~ the traditional deviation the the data.

### Main Points

Qualitative research involves evaluation of data such together words (e.g., native interviews), pictures (e.g., video), or objects (e.g., one artifact).

Quantitative study involves evaluation of number data.

There room strengths and weaknesses of both qualitative and also quantitative investigation.

Overly concentrating on the controversy of "qualitative matches quantitative" frames the approaches in opposition. It is vital to focus additionally on how the techniques have the right to be integrated, such together in mixed methods research. More an excellent can come the developing an abilities in both worlds than debating which method is superior.

We currently defined the terms physical and gimpppa.orgical nature of matter in the first lecture, currently we will proceed with further defining the nature of matter. We deserve to start with the terms intensive nature versus considerable properties. Intensive properties room those properties of issue that do not count on the quantity of the substance that is present. A list of some of the most typical intensive nature is shown here:

 Intensive properties of Matter Color Odor Luster Boiling Point Hardness Malleability Ductility Conductivity

Gary, Please connect the definitions listed below to the pictures as rollover or pop-up boxes.

Color - the wavelengths of irradiate as viewed by the human eyeOdor - the residential or commercial property of a substance the activates the sense of smellLuster - just how shiny a substance is. Boiling Point - The temperature at which the vapor pressure of a fluid is equal to the press on the liquid (generally atmospheric pressure). Hardness - How conveniently a substance can be scratched.

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Malleability - The capacity of a substance to it is in beaten into thin sheets. Ductility - The ability of a substance to be attracted into slim wires. Conductivity - The ability of a problem to permit the circulation of energy or electricity. Density - The mass of a substance divided by that volume Pressure - the force applied per unit area of a problem

Note that every one of these nature (like the instance of density above) deserve to be measured or calculated and also thus fall under the realm of quantitative data. When you could not think of color as being a number, that in fact can it is in measured making use of a spectrometer and the wavelength that the shade determined. Odors additionally are not automatically thought of in regards to numerical data however are in reality gaseous molecules that deserve to be measure up by mass spectrometry to yield the percentages of every component link by mass.

Extensive properties space the more commonly measured physical properties of matter and are dependent on the amount of problem present. Note below that mass and also weight are noted as different items although we frequently use the 2 terms interchangeably. As lengthy as we room on Earth, the mass and weight of an item are the same. If we move to the moon or Venus, the massive of an object will stay the same yet the weight will certainly change. A human weighing 150 lbs on planet would just weigh 24.9 lbs ~ above the moon and also on Venus, 136 lbs. For this reason although the mass continues to be 150 lbs the load changes based upon the gravity of the planet. Other dimensions like volume and also length will certainly be the exact same no issue where they are taken.

Extensive - Properties that do depend on the amount of matter present:

1) massive or Weight

Difference between Mass and Weight

 Mass - A measure of the quantity of issue in an object (grams). Weight - A measure of the gravitational force of attraction the the earth acting on one object.

2) Volume: