Activity 01
Demo: Thermohaline Tank Model
Fill clear tanks with warm coloured saltwater on top and cold plain water below. Add ice cubes to cool surface water and observe sinking. Groups measure flow speeds with timers and draw diagrams of the cycle. Discuss links to global conveyor.
Explain how ocean currents act as a global conveyor belt for heat.
Facilitation TipFor the Thermohaline Tank Model, circulate with a warm cup of water and food coloring so students can observe sinking and rising currents up close.
What to look forStudents will receive a card with a map of the North Atlantic. They must draw the path of the North Atlantic Drift and label two major cities whose climate is significantly influenced by it. They should write one sentence explaining why the current has this effect.