3. A student, Max, claims that the reason ice forms on top of lakes is because the less
dense water floats to the top of the lake, and the more dense water sinks to the bottom.
He uses this to reason that the 4°C water will rise to the top of the lake where it will
then become ice. Use the evidence in the video and graph to prove Max either wrong or
right.

Hint: At 4°C is the water more dense or less dense than average?