Grade 12 Lesson plan
Turnover and Intake Depth at Calderhurst Reservoir
A 60-minute grade 12 lesson using a calorimeter mixing investigation and energy balance to explain reservoir stratification and choose an intake blend.
NGSS · High School (9–12)
HS-PS3-4 Investigate thermal energy transfer toward uniform distribution
Plan and conduct an investigation to provide evidence that the transfer of thermal energy when two components of different temperature are combined within a closed system results in a more uniform energy distribution among the components in the system (second law of thermodynamics).
Clarification statement: Emphasis is on analyzing data from student investigations and using mathematical thinking to describe the energy changes both quantitatively and conceptually. Examples of investigations could include mixing liquids at different initial temperatures or adding objects at different temperatures to water.
Assessment boundary: Assessment is limited to investigations based on materials and tools provided to students.
Why water teaches this standard well
Mixing water at different temperatures is the clarification's own example investigation, and water's high specific heat is exactly what makes it the ideal medium here. The same property explains why lakes and reservoirs moderate temperature and why cold water holds more dissolved oxygen for fish.
Materials tagged with this code are written to the full standard , including its clarification statement and assessment boundary, and each carries a written note explaining the alignment. See how we review materials.
5 materials aligned to HS-PS3-4
Lesson plans
Labs & experiments
Grade 10 Lab / experiment
Why Lakes Warm Slowly: A Water Specific-Heat Mixing Lab
A grade 10 lab where students mix measured hot and cold water, predict the final temperature with a weighted average, and link it to water's high specific heat.
Grade 11 Lab / experiment
Mixing Warm and Cool Water: A Thermal Energy and Oxygen Lab
A grade 11 lab where students mix warm and cool water, predict the final temperature from an energy balance, and connect it to reservoir layering and fish oxygen.
Grade 12 Lab / experiment
Thermal Plume Mixing at the Kelverne Station Outfall
A grade 12 science lab in which students mix warm and cool water at three ratios, predict each final temperature with an energy balance, and test the prediction.
Grade 9 Lab / experiment
Verrin River Thermal Mixing: Heat, Equilibrium, and Oxygen
A grade 9 lab where students mix warm and cold water to find equilibrium temperature, modeling a power plant's thermal mixing zone and its effect on dissolved oxygen.