One easy rule
for estimating temperature in Fahrenheit is to double
the temperature in Celsius and add 30°.
Another simple method is to remember this poem by Carole
Greenes, Boston University:
30° is hot,
20° is pleasing,
10° is not,
0° is freezing.
is a big yard,
while a liter is a
A ton is 2000 lb. A metric ton is 1000 kg.The
difference is 200 lb or about 91 kg.
At sunset, the temperature at the moons
equator is about 58° F. During
the night, it drops to about 261° F.
temperature ever recorded in the United States was 134°
F on July 10, 1913, at Death Valley, California.
German physicist Daniel
(16861736) invented the
mercury thermometer in 1714. Before then, thermometers
Swedish astronomer Anders
introduced his scale in 1742.
The Celsius scale has become
part of the metric system of measurement and
is used throughout the world.