giga- prefix for BILLION
mega- prefix for MILLION
kilo- prefix for THOUSAND
deca- prefix for TEN
deci- prefix for ONE TENTH
centi- prefix for 1/100
milli- prefix for 1/1000
micro- prefix for 1 millionth
nano- prefix for 1 billionth
1 mm 1/1000 m
10 mm 1 cm
20 mm 2 cm
1 m 100 cm
50 cm 0.5 m
1 km 1000 m
1 kilogram 1000 g
2 kg 2000 grams
3 kilograms 3000 grams
2 Mg 2,000,000 g
1 Mg 1000 kg
100 g 0.1 kg
200 grams 0.2 kilograms
500 g half a kilogram
200 milligrams 0.2 grams
500 mg half a gram
g symbol for gram
kg symbol for kilogram
mg symbol for milligram
k symbol for prefix kilo-
m symbol for prefix milli-
c symbol for prefix centi-
M symbol for prefix mega-
G symbol for prefix giga-
100 m sprint race length
about 0.1 mm thickness of a piece of paper
about 22 cm width of a piece of paper
about 2 m height of an average door
about 100 km/h highway speed