42 terms

Chem unit one review

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conversion Factor
racial of two values of related quantities often a constant
Weight
Force exerted on matter by gravity
Experimental Group
the portion containing the independent variable
constant
determent value of rational under specified conditions
control Group
portion of experiment used to compare dependent variable results WITHOUT the independent
mass
The measure of the amount of matter an object contains
boiling point
The temperature of a liquid where its vapor pressure of a gas are inversely proportional
melting point
the temp of a solid when its crystal lattice begins to break apart
exothermic c
chemical reaction that gives off energy
qualitative
An observation made WITHOUT measurements
quantitative
and observation made WITH measurements
scientific notation
representing values with significant digits
endothermic
chemical reaction that ABSORBS energy
Hypothesis
prediction that can be tested to explain observations
Graphing
visual presentation showing relationship of two or more sets of data
Error
amount of difference between experimental results and actual values
International system
units that represent the same quantity are related to each other by some factor of ten
significant figures
in measured quantity include all the digits you know for sure,plus the final estimated digit
dimensional Analysis
use of conversion factors to solve for a needed variable
uncertainty
your bast measurement plus or minus 1 1/2 of the smallest division on the instrument
base unit
most common unit of measurement of given property
variables
conditions that's effect an experiment must be either studied or made constant
independent variable
single factor studied for cause and effect into the experiment group
dependent variable
experimental factor observed for change
is the X axis information
Theory
an explanation based on many observations and supported by the results of may experiments
technology
science applied through industry to improve life quality
Inference
process of observation and analysis providing ideas for developing hypothesis
scientific method
an organized process used by scientists to do research and to verify the work of others
data
information and facts observed or measured
observation
recording of data from the lab
analyzing
breaking down data to reveal patters and trends
the science that deals with the study of "stuff" that makes up the universe?
Chemistry
what is a better for "stuff"?
matter
the measure of the amount of "stuff" in an object is the____ of the object?
mass
A description of material using measurement is?
quantitative
what is observations such as color or odor called?
qualitative
what are the observations you can make about an object, such as its size,shape,color, odor,and tendency to react with other substances are?
properties of an object
Examples of the former are the elements and compounds, both of which are classified as________ because of their fixed compositions?
substances
An example of a latter is a combination of sand and salt that can be separated rather easily is called a?
mixture
Examples of former are elements and compounds, both of which are classified as______because of their fixed compositions?
substances
All homogeneous mixtures are?
solutions
A solution of two or more metals such as brass is?
alloy
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