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hardness and streak
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How do forensic scientists analyze unknown powders?
Forensic labs are often called in to identify unknown powders, liquids and pills that may be illicit drugs. There are basically two categories of forensic tests used to analyze drugs and other unknown substances: Presumptive tests (such as color tests) give only an indication of which type of substance is present -- but they can't specifically identify the substance. Confirmatory tests (such as gas chromatography/mass spectrometry) are more specific and can determine the precise identity of the substance.
List two things that line graphs allow scientists to do?
They allow scientist to identify trends and make predictions
What two groups of bacteria are you trying to identify when doing a mannitol galatinase and lipase tests?
Pathogenic and non-pathogenic Staphylococcus species.
Identify two advantages of mining minerals?
Two advantages of mining minerals are economic benefits, such as job creation and revenue generation for governments, and access to valuable resources that are essential for manufacturing goods and technology.
What two tests would you use to identify talc?
To identify talc, you could use the Mohs hardness test to determine its hardness, as talc has a low hardness of 1 on the Mohs scale. Additionally, you could perform a scratch test where talc can be easily scratched with a fingernail due to its softness.
Give two examples of how a rocks color provides clues to the rocks mineral composition?
This is out of "Prentice Hall Science Explorer"MINERAL COMPOSITION AND COLOR"Rocks are made of mixtures of minerals and other materials. Some rocks contain only a single mineral. Others can contain several minerals. These minerals are known as rock-forming minerals.A rock's color provides clues to the rock's mineral comp. For example, granite is generally a light-colored rock that has high silica content. Basalt, is a dark colored rock that is low in silica. But as with minerals, color alone does not provide enough information to identify a rock.Geologists observe the shape and color of crystals in a rock to identify the minerals that the rock contains. In identifying rocks, geologists also use some of the tests that are used to identify mineral's. For example, testing the surface of a rock with acid determines whether the rock includes minerals made of compounds called carbonates."
what is forensic drug testing?
Forensic drug testing is to identify unknown powders, liquids and pills that may be illicit drugs. There are basically two categories of forensic tests used to analyze drugs and other unknown substances. They are Presumptive tests and Confirmatory tests.
Why is metamorphic rock hard?
because a metamorphic rock is made up of different rocks.
What are two ways you can identify a physical property?
You can identify a physical property by observing and measuring characteristics such as color, shape, size, or density. Another way is to perform various tests or experiments to determine properties like melting point, boiling point, or conductivity.
Two gram negative bacilli that produce swarming colonies What biochemical tests would you use to identify the bacilli?
To identify the bacilli, biochemical tests such as oxidase test, catalase test, IMViC tests (Indole, Methyl Red, Voges-Proskauer, Citrate), and sugar fermentation tests can be used. These tests can help differentiate between different species and provide valuable information about the metabolic capabilities of the bacteria.
How could you identify two unknown white crystals such as salt and sugar?
If you can isolate the compound individually first, that's the best thing. Further to this, anion and cation tests will tell you what kind of salt it is. There are also tests to determine simple sugars.
What are two major groups of minerals?
what are the two major groups of minerals
