chemistry unit 1
The force per unit of area
pressure
A process whereby the concentration of one solution can be determined by adding controlled amounts of a solution with a kown concentration is called ___________
titration
Devices used to extend the senses or make observations safer are called ________
tools
The rate of change of velocity
acceleration
How close a measurement is to its true value, is its ______
accuracy
When you light a match, there is a brief ________ smell that almost burns your nose
acrid
The SI unit of electric current equal to one coulomb of electrons passing a particular location in one second is the ______
ampere
The measure of a two-dimensional surface within a specific boundary expressed in square units
area
A unit chosen to be the standard for a particular type of measurement
base unit
The SI unit of luminous intensity is the _______, which is based o the brightness of light emitted b a single candle
candela
A standard used for comparison
control
A ___________ ___________ is a ratio, often set up as a fraction, used to convert one set of units to another
conversion factor
An amount of electrons approximately equal to 6.241 509 48 x 10^18
coulomb
To ________ is to pour a liquid from one container into another without splashing or disturbing the contents of either
decant
The mass per unit of volume of a substance
density
A unit formed when other units are combined
derived unit
___________ _________ is a method of problem solving that focuses on units of measurement
dimensional analysis
The measure of the flow of electrons passing a particular location in a given amount in time
electric current
An organized procedure for conducting a controlled, measurable, and repeatable test or investigation is called a(n) ________
experiment
The total kinetic energy of all the particles within a substance
heat
A(n) ________ is a possible explanation for an observation, phenomenon, or scientific problem
hypothesis
Once the data is collected and the problem is defined, you formulate a ______ that attempts to solve the problem
hypothesis
The SI base unit of mass equal to the mass of a platinum-iridium cylinder kept at the BIPM is the ______
kilogram
The measure of distance
length
The measure of the amount of brightness of a light source
luminous intensity
The amount of matter in an object
mass
Chemistry is the study of
matter and the changes it undergoes
The ______ is the SI unit of length equal to the distance light travels in a vacuum in 1/299 792 458 of a second
meter
A ___ is a visual, verbal, or mathematical representation designed to explain a natural phenomenon
model
The mass of one mole of a substance
molar mass
The SI unit of particles of matter equal to 6.02 x 10^23 particles is the _______
mole
The foundation of the scientific process is _________
observation
The measure of the number of units, such as atoms, molecules, or ions of which all matter is made
particles of matter
The _______ is the SI unit of force equal to one newton exerted on a area of one square meter (N/m^2)
pascal
Something observable that happens in nature is called a ________
phenomenon
A __________ ________ is a physical item used as a standard for measurement
physical standard
The word __________ describes something having to do with the normal functions of an organism
physiologically
How close a series of measurements are to each other, is _________
precision
Facts or pieces of information that can be observed by the senses are called __________ __________
qualitative data
Facts or pieces of information that can be expressed as an amount are called __________ __________
quantitative data
A simple, factual, and precise statement that descries an action or set of actions
scientific law
An orderly method for observing nature and making predictions is called the ________ __________
scientific method
_____________ ___________ is a method of writing very large or very small numbers as a decimal number greater than one and less than 10 multiplied by a power of 10
scientific notation
The SI base unit for time is the ______, which is based on the duration of 9192 631 770 cycles of a particular frequency of a cesium-133 atom
second
All the known digits in a measurement, plus one estimated last digit, are _________ ___________
significant figures
The rate of motion of an object is called ________
speed
Something established by authority as a rule for measurement is called a __________
standard
__________ ___________ is the proper form for a number in scientific notation and consists of a number with only one digit to the left of the decimal point multiplied by a power of 10
standard form
The measure of the average kinetic energy of the particles of a substance
temperature
If a hypothesis has been confirmed many times by experimental data with no exceptions, then it may be the basis of a(n) _________
theory
The measure of the length of events and the duration of the interval between two events
time
A ______ is a specified quantity with which any other quantity of the same kind is measured
unit
Something that can change or be changed
variable
The rate of motion of an object with regard to direction is called _________
velocity
The amount of space occupied by a three dimensional object and expressed in cubic units
volume
The measure of the gravitational force acting upon an object
weight
