Question

1. how could the concept of convection be used to explain how continents move?

Explanation:

Convection currents form in Earth's mantle when heat from the core heats lower mantle rock, making it less dense and causing it to rise. As this rock nears the crust, it cools, becomes denser, and sinks back toward the core. This cyclic movement creates slow, horizontal currents in the mantle that drag the overlying tectonic plates (which carry continents) across the planet's surface, leading to continental movement.

Answer:

Convection currents in Earth's mantle drive continental movement:

1. Heat from Earth's core heats lower mantle rock, decreasing its density and causing it to rise toward the crust.
2. As the rock rises and cools near the crust, it becomes denser and sinks back toward the core.
3. This cyclic, circular convection motion creates horizontal currents in the mantle that pull the overlying tectonic plates (which hold continents) slowly across the planet's surface, resulting in the movement of continents over long periods of time.