A convection current is the circular movement of a fluid, like a liquid or gas, caused by heat differences: warmer material rises and cooler material sinks. This process helps move heat around in things like boiling water, air, and even Earth’s mantle.

Quick Scoop

Here’s the basic idea:

  • Heat makes fluid less dense , so it rises.
  • Cooler fluid is denser , so it sinks.
  • That rising-and-sinking motion creates a loop or current.

Simple Example

Think of a pot of water on a stove:

  1. Water near the bottom heats up.
  2. That warmer water rises.
  3. Cooler water moves down to take its place.
  4. The cycle repeats, making a convection current.

Where It Happens

Convection currents happen in:

  • Liquids and gases , because their particles can move freely.
  • Earth’s mantle , where they help drive plate movement.
  • Weather and oceans , where they affect wind and current patterns.

One-line definition

A convection current is a heat-driven circulation pattern in a fluid caused by differences in temperature and density.

If you want, I can also give you a one-sentence kid-friendly version or a diagram-style explanation.