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# 9weeks chemistry

used to write very large or very small numbers scientific notation
is a measure of the reproducibility of a measurement precision
is a technique for converting between units dimensional analysis
is used to make units larger or smaller metric prefixes
anything that has mass and volume matter
is the capacity to do work or produce heat energy
theoretically lowest temperature that can be reached absolute zero
substances that can not be changed into simpler substances by a chemical change element
substances that contain two or more elements in a fixed problem compounds
a blend of two or more pure substances mixture
a method to separate heterogeneous mixtures filtration
a method to separate homogeneous mixtures distillation
a measure of how hot or cold something is temperature
what are the states of matter? solid, liquid, gas
For numbers less than one the exponent is _______ negative
one calorie is the amount of heat that raises the temperature of one gram of water to one degree centigrade. T/F true
Liquids as matter have definite volume and definite shape T/F false
the SI temperature scale is called the ________ scale Kelvin
In the measurement 43.52, which digit is the most uncertain? 2
how many significant digits are in 6.80 3
the number 210,000 has how many significant digits? 2
which of the following is not a pure substance a) milk b)hydrogen c)water milk
what is the correct scientific notation for 503,000,000 5.03 x 10^8
A baby has a fever, his temperature is 40 degrees celsius. what is his temperature in the kelvin scale? K=C+273, K=40+273, K=313
How do you find Kelvin from Celsius? K=C+273
How do you find Celsius from Kelvin? C=K-273
after making observations and proposing an hypothesis, a scientist's next step is ____________ perform an experiment
the metric measure best suited to measure distance between Jackson, MS and Memphis, TN would be ________ kilometers
How many significant digits are in 5.0070 5
T/F: It is not necessary to clean up your work area in a lab False
T/F: All lab measurements are certain False
T/F: the density of a substance is measure g/cm^3 True
T/F: the metric system uses measures of ten to express large or small numbers and is used by the scientific community True
1 kilometer is equal to ________ meters 1000
1 centimeter = _______ millimeters 10
1 mega gram = _____ grams 1,000,000
5 x 10^-5 .00005
study of substances and the changes they undergo chemistry
orderly and systemic approach to gathering information to answer questions about the world scientifc method
proposed by unproved explanations of observed facts hypothesis
repeated explanation of phenomenon that occurs in the natural world theory
factor being tested in an experiment variable
smallest particle of an element that retains the chemical identity of that element atom
an atom or group of atoms with a net electrical charge ion
atoms that have the same number of protons but different number of neutrons isotope
is a negative charge decay beta radiation
Created by: jackjack109

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