chemistry unit 1

what is chemistry?

study of matter

independent variable

variable that is manipulated by you

Dependent Variable

the change that happens because of the independent variable

Controlled Variable

everything you want to remain constant and unchanging

y axis

dependent variable

x axis

independent variable

length

meter | m

mass

kilogram | kg

time

second | s

electric current

ampere | a

temperature

kevin | k

light intensity

candela | cd

amount of substance

mole | mol

kilo

10^3

hecto

10^2

deka

10^1

base unit

10^0

deci

10^-1

centi

10^-2

milli

10^-3

micro

10^-6

nano

10^-9

density

d = mass/vol

precision

multiple answers around the same value

accuracy

correct answer

% error

accepted value - experimental value/accepted value x 100

percent yield

experimental value/accepted value x 100

absolute error

experimental value - accepted value