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1.  a tall narrow container with a volume scale used especially for measuring liquids
https://www.merriam-webster.com/dictionary/graduated%20cylinder

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Triple beam balance is an instrument used to measure mass very precisely.https://en.wikipedia.org/wiki/Triple_beam_balance

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:  the quality or state of being dense measures of traffic density the density of the cakefelt that the candidate's density on the subject of equality was alarming the density of her prose https://www.merriam-webster.com/dictionary/density

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2. :  the amount of space occupied by a three-dimensional object as measured in cubic units (such as quarts or liters) :  cubic capacity https://www.merriam-webster.com/dictionary/volume

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a regularly interacting or interdependent group of items forming a unified whole a number system: such as

a (1) :  a group of interacting bodies under the influence of related forces a gravitationalsystem (2) :  an assemblage of substances that is in or tends to equilibrium a thermodynamic system
https://www.merriam-webster.com/dictionary/system

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2. capitalized :  the liturgy of the Eucharist (see Eucharist 1) especially in accordance with the traditional Latin rite (see rite 1)

3. 2

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Controlled Experiment                       a complex experiment including one or more control experiments or blank determinations along with the actual experimental testsa

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Controlled Experiment                       a complex experiment including one or more control experiments or blank determinations along with the actual experimental testsa

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https://www.merriam-webster.com/dictionary/controlled%20experiment

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1.  a mathematical variable whose value is determined by that of one or more other variables in a function
https://www.merriam-webster.com/dictionary/dependent%20variable

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Mathematics. a variable in a functional relation whose valuedetermines the value or values of other variables, as x in the relation
http://www.dictionary.com/browse/independent-variable

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an assumption or concession made for the sake of argument

https://www.merriam-webster.com/dictionary/hypothesis

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an act or instance of observing a custom, rule, or law
http://www.dictionary.com/browse/inference

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especially :  a conclusion or opinion that is formed because of known facts or evidence
***https://www.merriam-webster.com/dictionary/inference

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Sciencetific inquiry refers to the diverse ways in which scientists study the natural world and propose explanations they gatherhttps://www.merriam-webster.com/dictionary/dependent%20variable