Temperature |
oC |
degree Celcius |
Energy |
cal |
calorie (1 cal = 4.184 J) |
J |
joule (1 J = 0.239 cal) |
W |
watt (J s-1) |
Concentration |
ppmv |
parts per million by volume |
ppbv |
parts per billion by volume |
pptv |
parts per trillion by volume |
DU |
dobson unit |
Distance |
m |
meter |
|
Area |
m2 |
square meter |
ha |
hectare (104 m2; 10-2 km2) |
Mass |
g |
gram |
Tonne |
metric tonne (106 g; 1000 kg) |
Numbers |
thousand |
103 |
million |
106 |
billion |
109 |
|
Time |
s |
second |
d |
day |
yr |
year |
Prefixes |
c |
centi (10-2) |
k |
kilo (103) |
M |
mega (106) |
G |
giga (109) |
T |
tera (1012) |
P |
peta (1015) |
E |
exa (1018) |
|