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Chemistry vocab q 1

QuestionAnswer
Chemistry the study of the composition of matter and the changes that matter undergoes
Hypothesis proposed explanation for an observation
matter anything that has mass and occupies space
observation when you use your senses to obtain information
scientific methodology general style of investigation with a logical, systematic approach to the solution of a scientific problem
chemical change produces matter with a different composition than the original matter
compound substance that contains two or more elements chemically combined in a fixed proportion
element simplest form of matter that has a unique set of properties
gas form of matter that takes both the shape and volume of it container
heterogeneous mixture mixture in which the composition is not uniform throughout (can be separated physically)
Homogeneous mixture Mixture in which the composition is uniform throughout (can be separated physically)
law of conservation of mass/matter in any physical change or chemical reaction, mass is conserved/ mass is neither created nor destroyed
Liquid form of matter that has an indefinite shape, flows, yet has a fixed volume
mixture physical blend of two or more components
physical change some property of a material change, but the composition of the material does not change
solid form of matter that has a definite shape and volume
solution another name for a homogenous mixture
accuracy measure of how close a measurement comes to the actual or true value of whatever is measured
density ratio of the mass of an object to its volume (a physical property that represents how close or far apart the particles of a substance are, D=m/v
precision measure of how close a series of measurements are to another, irrespective of the actual value
Accepted value correct value for the measurement based on reliable references
measured value the value measured in the lab
Created by: user-2058569
 

 



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