chemistry unit 1

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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


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