1. Atmosphere: Convection currents in the atmosphere drive weather patterns. Warm, less dense air rises, cools, and then sinks, creating a cycle.

2. Mantle: Convection currents in the Earth's mantle, driven by heat from the core, are responsible for plate tectonics. The movement of these currents causes the Earth's plates to shift, leading to earthquakes, volcanoes, and mountain formation.

3. Oceans: Convection currents in the oceans are driven by differences in temperature and salinity. Warm, less dense water rises, while cold, denser water sinks, creating a circulation pattern that helps to distribute heat around the globe.

Let me know if you'd like to explore any of these convection currents in more detail!