A student is investigating the affect of roped off and a different type of
different salts on melting points. Four patches of ice of equal size are
iS salt is poured on each, one receives table salt (NaCI), one receives Calcium Chloride (CaCl2),
one receives Potassium Carbonate (KCO3)
The student measures the volume of ice
and the fourth receives inert sand instead. Each patch receives an equal amount of salt or sand. The s
from the original volume
remaining and subtracts it
of ice to see how much melted away. What is
a control variable in this experiment?
© A. None of these.
O B. The
size of the ice patches.
® C. The type of salt applied to the ice.
amount of ice that melted.
• D. The