INTRODUCTION: MATTER, ENERGY, AND MEASUREMENT

________ have the same composition and properties regardless of their origin.

________ (organic light- emitting diodes) are used in high- end cell phone, tablet, and television displays.

________ are composed of specially treated silicon.

________ also helps explain matter's qualities in terms of atoms, it's practically infinitesimally small building units.

All ________ is classified ultimately as either an element or a compound.

________ refers to how closely individual measurements agree with the correct, or "true, "value.

A measure of the hotness or coldness of an object, is a(n) ________ that determines the direction of heat flow.

Is a(n) ________ used as automobile antifreeze.

A substance changes its ________ but not its composition.

(Usually referred to simply as a substance) is matter that has ________ and a composition that does not vary from sample to sample.

________ to be separated is dissolved in the solvent.

The ________ (L) is larger than a quart and equals a cubic decimeter (dm^3) in chemistry.

________ has both a definite shape and a definite volume and is not compressible to any appreciable extent.

________ must manage the composition or structure of molecules to create new substances with various qualities.

In ________, units are multiplied together or divided into each other along with the numerical values.

Is the ________ of the universe; it is anything that has mass and occupies space.

The ________ and Kelvin scales have equal- sized units- that is, a kelvin is the same size as a degree ________.

________ (kJ) are used to discuss chemical reaction energies because joules are small amounts of energy.

The ________ is a physical change.

________ and oxygen react to generate 1 g of water, releasing 16 kJ of heat.

________ is defined as the capacity to do work or transfer heat.

Thus, ________ are written in the denominator and centimeters in the numerator.

Chemists work in universities and government agencies like the ________ of Health, Department of Energy, and Environmental Protection Agency.

________ is defined as the amount of mass in a unit volume of a substance:

On the ________, each element is composed of only one kind of atom.

The metric system, developed in France during the ________, is used as the system of measurement in most countries.

Water and table salt (________) are examples of pure substances.

________ are substances composed of two or more elements; they contain two or more kinds of atoms.

________ is a measure of how closely individual measurements agree with one another.

________ has a distinct volume independent of its container, assumes the shape of the portion of the container it occupies, and is not compressible to any appreciable extent.

The ________ for energy is the joule (pronounced "jool), "J, in honor of James Joule (1818−1889), a British scientist who investigated work and heat.

________ is a measure of the amount of material in an object.

The ________ and accuracy are often used in discussing the uncertainties of measured values.

A(n) ________ with an edge length of one meter has a volume of one cubic meter or m3.

________ on the Kelvin scale is the temperature at which all thermal motion ceases, a temperature referred to as absolute zero.

The ________ is the meter, a distance slightly longer than a yard.

For example, speed is defined as the ________ traveled to elapsed time.

(Also called a(n) ________), a substance is transformed into a chemically different substance.

For a given velocity, the ________ increases with increasing mass.

Is any characteristic that allows us to recognize a(n) ________ and to distinguish it from other types.

The units used for ________ are those of the metric system.

________ is central to our understanding of the world around us.

________ and nature employ the same components and follow the same laws.

Using ________ helps ensure that solutions to problems yield the proper units.

the macroscopic realm of ordinary-sized objects 1macro = large2 and the submicroscopic realm of atoms and molecules

materials, substances, or combinations of substances with desired properties

hydrogen and oxygen

Gold resists most acids

w = Fxd

Ek = 1/2 mv^2

1 cal = 4.184 J (exactly)

1 Cal = 1000 cal = 1 kcal

exact numbers (those whose values are known exactly) and inexact numbers (those whose values have some uncertainty)