# EVERYDAY SCIENCE

## SCIENCE

### EARTH SCIENCE

 Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Heat transfer by convection is caused by differences in what two things:
 A Thickness and material B Weight and electricity C Temperature and density D None of the above
Explanation:

Detailed explanation-1: -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.

Detailed explanation-2: -What causes the heat transfer by convection? It is caused by differences of temperature and density. currents within a fluid caused by differences of temperature and density.

Detailed explanation-3: -Convection is heat transfer due to a density differential within a fluid. As waterâ€™s temperature increases in the presence of a heat source, it will become less dense and rise. As it moves up and away from the heat source, it cools and becomes more dense and sinks.

Detailed explanation-4: -Convection currents tend to move fluid or gas particles from one place to another. These are created as a result of the differences occurring within the densities and temperature of a specific gas or fluid. Convection is one of the forms of heat transfer, of which the other two are radiation and conduction.

Detailed explanation-5: -Convection occurs due to the bulk movement of molecules within the liquid, gas, or liquid-gas mixture. Initially, heat is transferred between molecules via conduction, but the main heat transfer is via the motion of molecules within the fluid.

There is 1 question to complete.