A beaker of water, an indicator, and a hotplate
An indicator shows the presence of another substance.
indicator
a substance burns with a flame due to the presence of volatile substances in it
It explodes
Benedict's reagent is used as a test for the presence of all monosaccharides, and generally also reducing sugars. These include glucose, galactose, mannose, lactose and maltose. Even more generally, Benedict's test will detect the presence of aldehydes (except aromatic ones), and alpha-hydroxy-ketones, including those that occur in certain ketoses. - wikipedia
An indicator shows the presence of another substance.
presence
Combustion
combustion
combustion
This is the burning of a substance in the presence of oxygen.
Sputum cytology
Add some kind of substance, and then if this forms or does not form a substance it will prove whether the I negative ion is in the presence.
combustion
indicator
Assays is a procedure to analyze or quantify a substance in a sample to determine the presence and amount, as well as the potency. The fields that involve the use of assays are environmental biology, laboratory medicine, pharmacology, and molecular biology.
Yes, cheese is a substance. The definition of a substance is "the real physical matter of which a thing consists and that has a solid, tangible presence."