What is the main cause of convection?
Convection currents are the result of differential heating.
Lighter (less dense), warm material rises while heavier (more dense) cool material sinks.
It is this movement that creates circulation patterns known as convection currents in the atmosphere, in water, and in the mantle of Earth..
What factors affect convection?
Spontaneous convection is driven by buoyancy for the most part and surface tension to a lesser extent.exposed surface area.viscosity.density.conductivity (when conductivity is high, there is no need for convection)acceleration due to gravity.
What two factors set convection currents?
Heating and cooling of the fluid, changes in the fluid’s density, and the force of gravity combine to set convection currents in motion.
What causes convection quizlet?
Convection is heat transfer by the movement of currents with in a fluid. It is caused by the difference in temperature and density. … Heating and cooling of the fluid, changes in the fluid density, and the force of gravity, combine to set convection currents in motion.
How does convection current start?
Convection currents form because a heated fluid expands, becoming less dense. … As it rises, it pulls cooler fluid down to replace it. This fluid in turn is heated, rises and pulls down more cool fluid. This cycle establishes a circular current that stops only when heat is evenly distributed throughout the fluid.
What are the steps of convection currents?
Put the following steps of the convection process in the correct…Gravity pulls cooler matter downward.The matter expands and decreases in density.An up-and-down flow of matter produces a convection current.Matter is heated.Warmed matter is forced upward.