Food as the only source of energy for the body was specified by 20 students (with 7
from Year 8), while 74 students over the whole cohort stated that energy was one of a
number of sources, with oxygen and sleep being nominated as two of the other energy
sources. Students who stated that food was the only source of energy for the body also
indicated oxygen had no role in obtaining energy at all by claiming that air is involved
in breathing to keep us alive.