Which of the following best explains these
results?
a
b
c
some of the balloon's helium leaked out
when the balloon was moved.
the balloon's helium was not able to expand
and contract with the temperature changes.
the helium was probably less dense
compared with the second floor air than it
was compared with the basement air.
the helium was probably more dense
compared with the second-floor air than it
was compared with the basement air.