The speed of the molecules in the lake will decrease due to decrease in the kinetic energy.
What is kinetic energy?
Kinetic energy is the energy due to the motion of particles.
Kinetic energy increases with increase in temperature.
Since the temperature of the lake decreases ad it freezes, the kinetic energy decrease and the speed of the molecules in the lake will decrease.
Learn more about Kinetic energy at: https://brainly.com/question/25959744
