Task: Select which stirrer would feel hottest and explain why, and in which container soup would cool fastest, and explain why. Assessment focus: heat conduction.
Task: Students make predictions about evaporation rates of instances where surface areas are a factor, select which variable is being investigated in both examples and explain their answer. Assessment focus: Using knowledge of surface area to make predictions.
This practical task has students investigate the surface area of three objects and whether this influences the rate of evaporation. Students fill in a table, and calculate the water loss and answer questions to show their understanding.