Which occurs when a warm fluid cools down? ... The density of the fluid decreases.

What does a fluid do when it becomes hot?

When a liquid or gas is heated, the molecules move faster, bump into each other, and spread apart. ... The opposite occurs when a liquid or gas is cooled. The molecules move more slowly and take up less space. Therefore temperature can affect density.

What is conduction process?

Conduction is the process by which heat energy is transmitted through collisions between neighboring atoms or molecules. ... Conduction occurs more readily in solids and liquids, where the particles are closer to together, than in gases, where particles are further apart.