Morgan observes changes that occur to substances during four experiments. She records her observations in a table
Experiment
Observation
Type of
Change
two 100 ml beakers of liquids are combined
a precipitate is formed
physical
an egg is placed in a frying pan over high heat
the liquid egg becomes
solid
chemical
a candle is burned for 2 hours
the solid wax melts into
liquid
physical
two 300 ml beakers with of clear liquid are
combined
the liquid turns blue
chemical
Which mistake does Morgan make in her table?
A. A physical change occurs when the liquid turns blue because there was no precipitate formed
B. A chemical change occurs when two liquids combine and a precipitate is formed
C. A chemical change occurs when a candle is burned because there is a change in phase
D. A physical change occurs when an egg is cooked because there is a change in phase