The Franklin Stove
In 1742, Benjamin Franklin designed a wood-burning stove
to heat rooms. The front of the stove was open, allowing
heat to spread into a room. The back of the stove was
closed, but had an air intake that increased air circulation.
Fires lit in traditional fireplaces received less oxygen than
those lit in Franklin stoves.
What effect does a lit Franklin stove have on the air
molecules in a room?

A. decreases their mass
B. increases their speed
C. decreases their volume
D. increases their energy loss