science test sig, figs
draw 3 tempeture scales...?
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how many cm3 does 35.6 m equal?
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what are the rules for electric balence
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what are the four rules for sig figs?
1. digits other than 0 are always signifcant 2. all final 0's used after tyhe decimal point are significant 3. 0's between 2 other sig figs are always significant 4. zeros are yoused as placeholders after the decimal point are not significant
what is scientifice notation
1.3x10^3
what is the quasian for density
D=M/V
how many estimated digits can you have when makeinf a measurment?
`3
what sthe equasion for absoute and percent error?
absolute-- (lab answer)-known answer from table percent error- absolute error/ known answer from table x100
diffrence between accuracy and precsion
accuracy-how close you are to the accepted values percision- how reproducable your results are--more sig fgs
what is an element? how may it occour naturlly?
element- made up of one atom. organic substances
what are the SI basic units?
go to the table
what element do all living things have in them?
matter
what is weight?
measure of a force of gravity
what is a qualitive measurment?
measurement made up from an observation, not numbers
what is quantitive measurment?
measurment yourung #'s and units
what is the quasion for specific gravity?
mineral weight in air / (air-water)
kool aid, whitch is the solution, and whitch is the solvent
mix- solutiion water: solvent
whats tghe diffrence between a mixture and a substance
mixture: material that is made up of 2 or more substances that are NOT chemicly bonded substance: fixed composition with fixed properties
what 2 factors control if you have quality measurment?
percision oif the instrument, and the person taking the measurment
draw the summery diagram for matter
refer to practivce test
rounding sig figs for additions and subtraction?
smallest #of decimal plates in the the caculations
what are the rounding rules for sig figs when using (x+/)?
smallest #of sig figs
what is chemestry?
study of matter ad how it changes
what is a significant figure?
the # of numbers in a answer
what is specific gravity
the comparison ofo mineral weight in air and mineral weight in water.
why does your weight change on other planets?
the gravitational pull
what is density?
the mass of an object compared to its volume
homogeneous mix?
usually liquid, mixed for you can not see the individual parts
what is meniscus? what part of it do you need to record your measurment?
when one side of the molocule is positive and one is negative. you need the bottem of the curve in your measurment
what is a compound?
when you bond 2 or more elements together
what is a heterogeneous mixture?
where you can see the individual parts: trail mix
why does you mass nomt change on other planets?
you stil take up the same amount of room
