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Unit 1 test
Dencity, coverting units etc
31
Chemistry
10th Grade
09/24/2007
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Term
Tera(T)
 Definition
10^12
1,000,000,000,000
Term
Giga(G)
 Definition
10^9
1,000,000,000
Term
Mega(M)
 Definition
10^6
1,000,000
Term
Kilo(k)
 Definition
10^3
1,000
Term
Hecto(h)
 Definition
10^2
100
Term
Deka(da)
 Definition
10^1
10
Term
Deci(d)
 Definition
10^-1
1/10
Term
Centi(c)
 Definition
10^-2
1/100
Term
Milli(m)
 Definition
10^-3
1/1,000
Term
Micro
 Definition
10^-6
1/1,000,000
Term
Nano(n)
 Definition
10^-9
1/1,000,000,000
Term
Pico(p)
 Definition
10^-12
1/1,000,000,000,000
Term
femeneto(f)
 Definition
10^-15
1/1,000,000,000,000,000
Term
Atto(a)
 Definition
10^-18
1/1,000,000,000,000,000,000
Term
Density=
 Definition
mass/volume
Term
volume=
 Definition
mass/density
Term
mass=
 Definition
density x volume
Term
Chemistry
 Definition
the science that deals with the composition and properties of substances and various elementary forms of matter.
Term
Chemical Changes
 Definition
any change from one state (gas, liquid, solid) which is accompanied by alteration of the chemical composition
Term
Physical Changes
 Definition
any process involving a substance's change from one state (gas, liquid, solid) to another without alteration of the chemical composition
Term
Element
 Definition
one of a class of substances that cannot be separated into simpler substances by chemical means.
Term
Compound
 Definition
a pure substance composed of two or more elements whose composition is constant.
Term
Mixture
 Definition
A composition of two or more substances that are not chemically combined with each other and are capable of being separated.
Term
Homogeneous mixture
 Definition
any combination of substances that has uniform composition and properties; a mixture that is uniform throughout
Term
Heterogeneous mixture
 Definition
any combination of substances that does not have uniform composition and properties; a mixture of physically distinct substances with different properties
Term
Metals
 Definition
Any of a category of electropositive elements that usually have a shiny surface, are generally good conductors of heat and electricity, and can be melted or fused, hammered into thin sheets, or drawn into wires
Term
Nonmetals
 Definition
Any of a number of elements, such as oxygen or sulfur, that lack the physical and chemical properties of metals.
Term
Periods
 Definition
A sequence of elements arranged in order of increasing atomic number and forming one of the horizontal rows in the periodic table.
Term
Groups
 Definition
In the Periodic Table, a vertical column that contains elements having the same number of electrons in the outermost shell of their atoms.
Term
Presicion
 Definition
the extent to which a given set of measurements of the same sample agree with their mean.
Term
Accuracy
 Definition
the extent to which a given measurement agrees with the standard value for that measurement.
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