Question

From what you've learned in this lesson, why is it possible for the surface of a pond to freeze even though the water underneath is fluid?

Answer 1

The water below the surface is much more dense

Step-by-step explanation:

The surface is the first to freeze as it is closest to the cold air, therefor the temperatures affects the surface much quicker than below it. This is because of the density, and it takes longer to fully freeze or even alter the temperature of a large amount of water.