Question

what happens in a convection cell?
cold, dense material sinks while hot, less dense material rises.
hot, less dense material rises and cold dense material also rises.
cold, dense material moves horizontally, while hot, less dense material moves vertically.
hot, less dense material moves horizontally, while cold, dense material moves vertically.

Explanation:

A convection cell operates based on density differences caused by temperature changes. When a material is heated, it becomes less dense and rises; when it cools, it becomes denser and sinks, creating a cyclic flow. The other options incorrectly describe the movement of hot/cold material.

Answer:

Cold, dense material sinks while hot, less dense material rises.