Science Sect. 1.2, 1.3, &1.4 Vocab – Flashcards
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agar is solidifying agent used in media preparation. what makes it ideal for cultivation of microbes?
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Agar melts at 100?C but does not solidify until it reaches 45?C, which will not kill microbial cells so inoculation of molten media (e.g., pour plates) is possible. Agar is also relatively inert and is not degraded by most microbes.
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weight
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The measure of the force of gravity on a substance
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mass
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The measure of how much matter is in a substance
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volume
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The amount of space a substance takes up
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density
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The measure of how much mass is in a given volume
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S.I.
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Means the International System of Units(Metric System). The system of metric units used by scientists to measure the properties of matter.
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atom
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The smallest particle of an element
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molecule
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The smallest unit of a compound, or a combination of two or more atoms.
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chemical bond
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The force that holds two atoms together
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ore
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A rock that contains a metal or other economically useful element
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electrolysis
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A process in which an electrical current breaks chemical bonds
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electrode
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A metal strip used in electrolysis
