CHM-113 EXAM 1 KITZMILLER
chemistry - Answer -the study of matter and the changes that matter undergoes
matter - Answer -the psychical material of the universe; anything that has mass and
occupies space.
property - Answer -any characteristic that allows us to recognize a particular type of
matter and to distinguish from other types.
atoms - Answer -the infinitesimal (submicroscopic) building blocks of matter
molecules - Answer -two or more atoms joined in specific shape
states of matter - Answer -gas, liquid, solid
gas - Answer -has no fixed volume or shape; uniformly fills a container.
liquid - Answer -distinct volume indépendant of its container; assumes the shape of the
portion of the container it occupies.
solid - Answer -definite shape and definite volume
what is a pure substance? - Answer -matter that has distinct properties and a
composition that does not vary from sample to sample. All substances are either
elements of compounds.
What is an element? - Answer -(on the molecular level) only composed of one kind of
atom and cannot be decomposed into similar substances.
what is a compound? - Answer -substances composed of two or more elements
(contain two or more different kinds of atoms).
What is a mixture? - Answer -a combination of two or more in which each retains its
chemical identity.
What 5 elements account for over 90% of the earth's crust? - Answer -oxygen, silicon,
aluminum, iron, and calcium.
Law of definite proportions - Answer -the elemental composition of a pure compound is
always the same, regardless of it's source.
What is a homogenous mixture? - Answer -a mixture of substances that has a uniform
composition.
, what is a heterogenous mixture? - Answer -mixtures that are not uniform throughout.
what are the 2 different properties of matter? - Answer -chemical and physical.
physical change - Answer -changes that occur with no change in chemical composition.
chemical change (chemical reaction) - Answer -processes in which one or more
substances are converted into other substances.
changes of state - Answer -changes of matter from one state to a different one; exp.
gas to a liquid. All changes of state are physical changes.
what system is used for scientific measurement? - Answer -metric
what is a hypothesis? - Answer -a tentative explanation of a series of observations or of
natural law.
in science, what is a theory? - Answer -a tested model or explanation that satisfactorily
accounts for a certain set of phenomena.
what is scientific law? - Answer -a concise verbal statement or a mathematical
equations hat summarizes a wide range of observations and experiences.
what is the difference between a theory and scientific law? - Answer -scientific law is a
statement of what always happens whereas a theory is an explanation for what
happens.
What are SI units? - Answer -The preferred metric units for use in science. It has 7
base units from which all other units are derived.
what is the SI base unit length? - Answer -the meter (m)
what is the SI base unit of mass? - Answer -the kilogram (kg)
what is the SI base unit of temperature? - Answer -kelvin (K)
what is the SI base unit of time? - Answer -seconds (s or sec)
what is the SI base unit of amount of substance? - Answer -Mole (mol or M)
what is the absolute temperature scale? - Answer -Kelvin. Zero (aka absolute zero) on
the Kelvin scale corresponds to -273.15 degrees Celsius. The freezing point of water is
273.15 K, or 0 degrees Celsius, or 32 degrees Fahrenheit.
chemistry - Answer -the study of matter and the changes that matter undergoes
matter - Answer -the psychical material of the universe; anything that has mass and
occupies space.
property - Answer -any characteristic that allows us to recognize a particular type of
matter and to distinguish from other types.
atoms - Answer -the infinitesimal (submicroscopic) building blocks of matter
molecules - Answer -two or more atoms joined in specific shape
states of matter - Answer -gas, liquid, solid
gas - Answer -has no fixed volume or shape; uniformly fills a container.
liquid - Answer -distinct volume indépendant of its container; assumes the shape of the
portion of the container it occupies.
solid - Answer -definite shape and definite volume
what is a pure substance? - Answer -matter that has distinct properties and a
composition that does not vary from sample to sample. All substances are either
elements of compounds.
What is an element? - Answer -(on the molecular level) only composed of one kind of
atom and cannot be decomposed into similar substances.
what is a compound? - Answer -substances composed of two or more elements
(contain two or more different kinds of atoms).
What is a mixture? - Answer -a combination of two or more in which each retains its
chemical identity.
What 5 elements account for over 90% of the earth's crust? - Answer -oxygen, silicon,
aluminum, iron, and calcium.
Law of definite proportions - Answer -the elemental composition of a pure compound is
always the same, regardless of it's source.
What is a homogenous mixture? - Answer -a mixture of substances that has a uniform
composition.
, what is a heterogenous mixture? - Answer -mixtures that are not uniform throughout.
what are the 2 different properties of matter? - Answer -chemical and physical.
physical change - Answer -changes that occur with no change in chemical composition.
chemical change (chemical reaction) - Answer -processes in which one or more
substances are converted into other substances.
changes of state - Answer -changes of matter from one state to a different one; exp.
gas to a liquid. All changes of state are physical changes.
what system is used for scientific measurement? - Answer -metric
what is a hypothesis? - Answer -a tentative explanation of a series of observations or of
natural law.
in science, what is a theory? - Answer -a tested model or explanation that satisfactorily
accounts for a certain set of phenomena.
what is scientific law? - Answer -a concise verbal statement or a mathematical
equations hat summarizes a wide range of observations and experiences.
what is the difference between a theory and scientific law? - Answer -scientific law is a
statement of what always happens whereas a theory is an explanation for what
happens.
What are SI units? - Answer -The preferred metric units for use in science. It has 7
base units from which all other units are derived.
what is the SI base unit length? - Answer -the meter (m)
what is the SI base unit of mass? - Answer -the kilogram (kg)
what is the SI base unit of temperature? - Answer -kelvin (K)
what is the SI base unit of time? - Answer -seconds (s or sec)
what is the SI base unit of amount of substance? - Answer -Mole (mol or M)
what is the absolute temperature scale? - Answer -Kelvin. Zero (aka absolute zero) on
the Kelvin scale corresponds to -273.15 degrees Celsius. The freezing point of water is
273.15 K, or 0 degrees Celsius, or 32 degrees Fahrenheit.
