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40 Cards in this Set
- Front
- Back
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What is accurate?
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Degree of agreement between the true value and the meassured value.
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define Chemical Property?
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Causing a change in composition & only be observed through a chemical reaction.
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What is chemical reaction?
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Process of rearranging, removing & replacing atoms to produce a new substance.
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Define Chemistry?
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Is the study of matter, its chemical and physical properties, the chemical and physical changes it undergoes, and the energy that accompany those processes.
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What is Compound?
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A substance resulting from the combination of two or more elements in a defined, reproducable way, in a fixed ratio.
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Define Concentration?
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Is a measure of the number of particales of a substance, or the mass of those particles, that are contained in a specified volume.
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What is data?
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is the individual result of a single measurement or observation.
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Define density?
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is the ration of mass to volume.
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what is a element?
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a pure substance that cannot be changed into a simpler form of matter by any chemical reaction.
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what is energy?
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ability to do work to accomplish some change.
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what is an error?
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the differance between the true value and our estimation or meassurement of the value.
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what is the extensive property?
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Property of matter that depends on the quantity & mass.
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what is the gasouses state?
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matter with particles widely spread, no defined shape or volume.
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what is a heterogeneous mixture?
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mixture of ununiform composition.
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what is a homogeneous mixture?
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has a uniform composition an particles are well mixed.
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Define hypothesis?
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simply an attempt to explain an observation, or a series of observations, in a common way.
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What is intensive properties?
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are independent of the quanity of a substance.
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WHat is kinetic energy
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is energy of motion.
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Law is what?
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summery of a large quantity of information
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what is the liquid state?
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PArticles are closer together has a defined volume but no defined shape.
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Define mass?
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is the quantity of matter in a givin object.
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what is matter?
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anything that has mass or occupies space.
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What is mixture?
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A combination of 2 or more substances in which each substance retains its identity.
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what is physical change?
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Produces a recognizable differance in apperance of a substance, without causeing change to its composition.
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What is physical property?
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observation without changing the composition, or identity of a substance.
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Potential energy is what?
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is the energy of position/ stored energy.
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define precision?
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a measure of the agreement of a replicate measurement.
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Properties are what?
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either physical or chemical.
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what is pure substance?
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has only one compound.
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what is a result?
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outcomes of experiments.
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what is the scientific method?
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consists of six interrelated processes, observation, question, hypothesis, experiment, data analisis, theory, law.
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scientific notation is what?
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used to express very large or very small nubers easilly and with the correct number of sig. fig.
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Sig. fig. is what
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information bearing digits or figuers in a number are significant figures.
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what is the solid state?
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PArticles are veryclose together has defined volume and shape.
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Specific gravity is what?
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the ratio of density of object in question to the desity of pure water.
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tempuratur is what?
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degree of hotness of an object.
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what is theory?
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is a hypothesis supported by extensive testing
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What is uncertainty?
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is the degree of doubt in a single measurement.
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unit is defined as?
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basic quantity of mass, volume, time, temp, an so on.
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weight is defined as?
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the force of gravity on an object.
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