GEOLOGY

Detailed explanation-1: -The uneven heating of a fluid causes convection currents. As the fluid is heated, it becomes less dense and rises. The change in density is caused by the molecules of the fluid moving faster and further apart. The further apart the molecules are, the less dense the fluid will be, causing it to rise.

Detailed explanation-2: -Convection currents (sometimes also called “density currents”) result from differences in density of a substance, and density can be altered by changing the temperature, salinity, or pressure of a substance. Less dense substances RISE, while more dense substances SINK.

Detailed explanation-3: -Convection works by areas of a liquid or gas heating or cooling greater than their surroundings, causing differences in temperature. These temperature differences then cause the areas to move as the hotter, less dense areas rise, and the cooler, more dense areas sink.

Detailed explanation-4: -The rising and sinking of warm and cooler material is called convection. Conduction brings hot material up toward the surface. It brings cooler material down toward the core, and so on.

Detailed explanation-5: -Heat transfer by convection is caused by differences in temperature and density within a fluid. Density is a measure of how much mass there is in a volume of a substance. When a liquid or gas is heated, the particles move faster. As they move faster, they spread apart.