Students designed experiments to investigate how molecules move during diffusion.
Their experimental designs are below. Determine which experimental design would be most effective and complete the statement with the correct reasoning.
Student A: Start with water at 20°C and add food coloring to one side of the membrane. Time how long it takes for the food coloring to appear on the other side.
Repeat this procedure four more times with the temperature increasing every time by 5°C. The food coloring will take less time to cross the membrane at higher temperatures because diffusion is active transport.
Students B: Start with water at 20°C and add food coloring to one side of the membrane. Time how long it takes for the food coloring to appear on the other side.
Repeat the procedure four times. The molecules of food coloring will move even if no heat energy is added because diffusion is passive transport.
