CHEMISTRY 104 EXAM 1 REVIEW QUESTIONS WITH CORRECT ANSWERS LATEST UPDATE 2026
Chemistry - Answers the study of the composition, structure, and properties of matter and the
changes it undergoes
Scientific Method - Answers set of general procedures based on experimentation and observation
used to acquire scientific knowledge and explain natural phenomena
Hypothesis - Answers model or statement that can be tested by experiment, offers an explanation for
a scientific law
Experiment - Answers well defines controlled procedure for obtaining information about a system
under study
Observation - Answers statement that describes something we see, hear, smell, taste, or feel
Scientific Fact - Answers is a reproducible piece of data about some natural phenomenon that is
obtained from experimentation
Scientific Law - Answers generalization that summarizes scientific facts about a natural phenomenon
Scientific Theory - Answers scientific hypothesis that has been tested and validated over a long period
of time
Exact Number - Answers number that has a value with no uncertainty in it, known exactly
Inexact Number - Answers number that has a value with a degree of uncertainty in it
Precision - Answers indicator of how close a series of measurements on the sam object are to each
other
Accuracy - Answers indicator of how close a measurement comes to a true or accepted value
Significant Figures - Answers digits in any measurement that are known with certainty plus one digit
that is uncertain
Scientific Notation - Answers A method of writing or displaying numbers in terms of a decimal number
between 1 and 10 multiplied by a power of 10.
SI Base Unit - Answers one of seven SI units of measurement from which all other SI measurement
units can be derived
meter, kilogram, second, kelvin, mole, ampere, candela - Answers Name SI base units
Derived Unit - Answers a unit that is defined by a combination of base units
Energy - Answers (physics) the capacity of a physical system to do work
Potential Energy - Answers energy stored due to an object's position or arrangement
Kinetic Energy - Answers the energy an object has due to its motion
Law of Conservation of Energy - Answers energy can be interconverted between kinetic and potential,
total amount of energy remains the same
Kinetic Molecular Theory - Answers the theory that all matter is composed of particles (atoms and
molecules) moving constantly in random directions
Matter - Answers anything that takes up space and has mass
Atom - Answers smallest unit of matter
Molecule - Answers bigger unites of two or more atoms joined together
Compound - Answers pure substance that can be broken down into two or more simpler substances
using chemical means
Mixture - Answers physical combination of two or more pure substances in which each substance
retains its own identity
Pure Substance - Answers single kind of matter that cannot be separated into other kinds of matter
using physical means
Physical Property - Answers characteristic of a substance that can be observed without changing the
substance into another substance ex: color, odor, taste, size, physical state, boiling and melting point,
density
Chemical Property - Answers characteristic of a substance that describes the way the substance
undergoes or resists change to form a new substance ex: reacts, combusts, rust, does not react,
produced something
Fundamental Particle - Answers a particle that is less complex than an atom, one object keeps dividing
repeatedly over and over again
Element - Answers pure substance that cannot be broken down into simpler pure substances using
ordinary chemical means such as a chemical reaction, an electric current, hear, or a beam of light
Homogeneous Mixture - Answers mixture that contains only one visually distinguishable phase, has
uniform properties throughout example: sugar water where sugar has been dissolved
Chemistry - Answers the study of the composition, structure, and properties of matter and the
changes it undergoes
Scientific Method - Answers set of general procedures based on experimentation and observation
used to acquire scientific knowledge and explain natural phenomena
Hypothesis - Answers model or statement that can be tested by experiment, offers an explanation for
a scientific law
Experiment - Answers well defines controlled procedure for obtaining information about a system
under study
Observation - Answers statement that describes something we see, hear, smell, taste, or feel
Scientific Fact - Answers is a reproducible piece of data about some natural phenomenon that is
obtained from experimentation
Scientific Law - Answers generalization that summarizes scientific facts about a natural phenomenon
Scientific Theory - Answers scientific hypothesis that has been tested and validated over a long period
of time
Exact Number - Answers number that has a value with no uncertainty in it, known exactly
Inexact Number - Answers number that has a value with a degree of uncertainty in it
Precision - Answers indicator of how close a series of measurements on the sam object are to each
other
Accuracy - Answers indicator of how close a measurement comes to a true or accepted value
Significant Figures - Answers digits in any measurement that are known with certainty plus one digit
that is uncertain
Scientific Notation - Answers A method of writing or displaying numbers in terms of a decimal number
between 1 and 10 multiplied by a power of 10.
SI Base Unit - Answers one of seven SI units of measurement from which all other SI measurement
units can be derived
meter, kilogram, second, kelvin, mole, ampere, candela - Answers Name SI base units
Derived Unit - Answers a unit that is defined by a combination of base units
Energy - Answers (physics) the capacity of a physical system to do work
Potential Energy - Answers energy stored due to an object's position or arrangement
Kinetic Energy - Answers the energy an object has due to its motion
Law of Conservation of Energy - Answers energy can be interconverted between kinetic and potential,
total amount of energy remains the same
Kinetic Molecular Theory - Answers the theory that all matter is composed of particles (atoms and
molecules) moving constantly in random directions
Matter - Answers anything that takes up space and has mass
Atom - Answers smallest unit of matter
Molecule - Answers bigger unites of two or more atoms joined together
Compound - Answers pure substance that can be broken down into two or more simpler substances
using chemical means
Mixture - Answers physical combination of two or more pure substances in which each substance
retains its own identity
Pure Substance - Answers single kind of matter that cannot be separated into other kinds of matter
using physical means
Physical Property - Answers characteristic of a substance that can be observed without changing the
substance into another substance ex: color, odor, taste, size, physical state, boiling and melting point,
density
Chemical Property - Answers characteristic of a substance that describes the way the substance
undergoes or resists change to form a new substance ex: reacts, combusts, rust, does not react,
produced something
Fundamental Particle - Answers a particle that is less complex than an atom, one object keeps dividing
repeatedly over and over again
Element - Answers pure substance that cannot be broken down into simpler pure substances using
ordinary chemical means such as a chemical reaction, an electric current, hear, or a beam of light
Homogeneous Mixture - Answers mixture that contains only one visually distinguishable phase, has
uniform properties throughout example: sugar water where sugar has been dissolved
