GENERAL CHEMISTRY CHAPTER 1
AND 2 TEST
Scientific method - Correct Answers -The process of studying natural phenomena,
involving observations, forming laws and theories, and testing of theories by
experimentation.
Measurement - Correct Answers -A quantitative observation.
Hypothesis - Correct Answers -One or more assumptions put forth to explain the
observed behavior of nature.
Theory - Correct Answers -A set of assumptions put forth to explain some aspect of the
observed behavior of matter.
Model - Correct Answers -A set of assumptions put forth to explain the observed
behavior of matter. The models of chemistry usually involve assumptions about the
behavior of individual atoms or molecules.
Natural law - Correct Answers -A statement that expresses generally observed
behavior.
Law of conservation of mass - Correct Answers -Mass is neither created nor destroyed.
SI system - Correct Answers -International System of units based on the metric system
and units derived from the metric system.
Mass - Correct Answers -The quantity of matter in object.
Weight - Correct Answers -The force exerted on an object by gravity.
Radioactivity - Correct Answers -Spontaneous emissions of radiation by uranium.
Nuclear atom - Correct Answers -An atom having a dense center of positive charge (the
nucleus) with electrons moving around the outside.
Nucleus - Correct Answers -The small, dense center of positive charge in an atom.
, Uncertainty - Correct Answers -The characteristic that any measurement involves
estimates and cannot be exactly reproduced.
Significant figures - Correct Answers -The certain digits and the first uncertain digit of a
measurement.
Accuracy - Correct Answers -The agreement of a particular value with the true value.
Precision - Correct Answers -The degree of agreement among several measurements
of the same quantity; the reproducibility of a measurement.
Random error - Correct Answers -An error that has an equal probability of being high or
low.
Systematic error - Correct Answers -An error that always occurs in the same direction.
Exponential notation - Correct Answers -Expresses a number as M x 10ⁿ, a convenient
method for representing a very large or very small umber and for easily indicating the
number of significant figures.
Unit factor method - Correct Answers -An equivalence statement between units used for
converting from one unit to another.
Dimensional analysis - Correct Answers -Converting a given result from one system of
units to another.
Density - Correct Answers -A property of matter representing the mass per unit volume.
Matter - Correct Answers -The material of the universe.
States (of matter) - Correct Answers -The three different forms in which matter can
exist; solid, liquid, and gas.
Homogeneous mixture - Correct Answers -Mixtures having visibly indistinguishable
parts.
Heterogeneous mixture - Correct Answers -Mixtures having visibly distinguishable parts.
Solution - Correct Answers -A homogeneous mixture.
Pure substance - Correct Answers -A substance with a constant composition.
Physical change - Correct Answers -A change in the form of a substance, but not in its
chemical composition; chemical bonds are not broken in a physical change.
AND 2 TEST
Scientific method - Correct Answers -The process of studying natural phenomena,
involving observations, forming laws and theories, and testing of theories by
experimentation.
Measurement - Correct Answers -A quantitative observation.
Hypothesis - Correct Answers -One or more assumptions put forth to explain the
observed behavior of nature.
Theory - Correct Answers -A set of assumptions put forth to explain some aspect of the
observed behavior of matter.
Model - Correct Answers -A set of assumptions put forth to explain the observed
behavior of matter. The models of chemistry usually involve assumptions about the
behavior of individual atoms or molecules.
Natural law - Correct Answers -A statement that expresses generally observed
behavior.
Law of conservation of mass - Correct Answers -Mass is neither created nor destroyed.
SI system - Correct Answers -International System of units based on the metric system
and units derived from the metric system.
Mass - Correct Answers -The quantity of matter in object.
Weight - Correct Answers -The force exerted on an object by gravity.
Radioactivity - Correct Answers -Spontaneous emissions of radiation by uranium.
Nuclear atom - Correct Answers -An atom having a dense center of positive charge (the
nucleus) with electrons moving around the outside.
Nucleus - Correct Answers -The small, dense center of positive charge in an atom.
, Uncertainty - Correct Answers -The characteristic that any measurement involves
estimates and cannot be exactly reproduced.
Significant figures - Correct Answers -The certain digits and the first uncertain digit of a
measurement.
Accuracy - Correct Answers -The agreement of a particular value with the true value.
Precision - Correct Answers -The degree of agreement among several measurements
of the same quantity; the reproducibility of a measurement.
Random error - Correct Answers -An error that has an equal probability of being high or
low.
Systematic error - Correct Answers -An error that always occurs in the same direction.
Exponential notation - Correct Answers -Expresses a number as M x 10ⁿ, a convenient
method for representing a very large or very small umber and for easily indicating the
number of significant figures.
Unit factor method - Correct Answers -An equivalence statement between units used for
converting from one unit to another.
Dimensional analysis - Correct Answers -Converting a given result from one system of
units to another.
Density - Correct Answers -A property of matter representing the mass per unit volume.
Matter - Correct Answers -The material of the universe.
States (of matter) - Correct Answers -The three different forms in which matter can
exist; solid, liquid, and gas.
Homogeneous mixture - Correct Answers -Mixtures having visibly indistinguishable
parts.
Heterogeneous mixture - Correct Answers -Mixtures having visibly distinguishable parts.
Solution - Correct Answers -A homogeneous mixture.
Pure substance - Correct Answers -A substance with a constant composition.
Physical change - Correct Answers -A change in the form of a substance, but not in its
chemical composition; chemical bonds are not broken in a physical change.
