Measuring and Density

Length

metric: meter (m)

SI: meter (m)

Volume

metric: liter (L)

SI: cubic meter (m^3)

Mass

metric: gram (g)

SI: kilogram (kg)

Temperature

metric: degrees Celsius (C°)

SI: kelvins (K)

Time

metric: seconds (s)

SI: seconds (s)

kilo

k; 1000m, 10^3

deci

d, 0.1, 10^-1, 1/10

centi

c, 0.01, 10^-2, 1/100

milli

m, 0.001, 10^-3, 1/1000

455.2 cm

4 sig figs; all nonzero digits are significant

0.80 m

2 sig figs; a zero following a decimal number is significant

50.2 L

3 sig figs, A zero between nonzero digits is significant

0.0005 lb

1 sig fig; zeros to the left of nonzero numbers are not significant

25000 ft

2 sig figs; placeholder zeros are not significant

density of a substance

mass (g)/volume (ml or cm^3)

density of water

1.00 g/ml at 4° C

a substance with a density greater than 1 will

sink

a substance with a density less than 1 will

Float