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 are conventions currents and what causes them?
convection currents occur
when a heated fluid expands, becoming less dense, and rises
. The fluid then cools and contracts, becoming more dense, and sinks.
What are convection currents and what causes them 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.
What are convection currents?
Convection currents
transfer heat from one place to another by mass motion of a fluid
such as water, air or molten rock. The heat transfer function of convection currents drives the earth’s ocean currents, atmospheric weather and geology.
What causes convection currents quizlet?
What causes 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.
Which is an example of convection currents?
Convection currents are present in the air– A good example of convection current is
the warm air that rises towards the ceiling in your house
. The process happens as the warm air is said to be less dense than that of the colder air. Another good example of convection current is wind.
What does not play a role in convection in the mantle?
The core
does not play an active role in mantle convection. The magnitude of the bottom TBL depends on the cooling rate of the mantle, the pressure and temperature dependence of the physical properties and the radioactivity of the deep mantle.
What are the three main sources of convection?
The primary sources of thermal energy for mantle convection are three: (1)
internal heating due to the decay of the radioactive isotopes of uranium, thorium, and potassium
; (2) the long-term secular cooling of the earth; and (3) heat from the core.
What is the effect of convection currents?
Convection currents within the Earth’s mantle are
movements of the magma that are less dense, therefore they rise
. As they move away from the Earth’s heat source, the core, the magma cools off and becomes more dense, causing it to sink.
Why is convection current important?
Convections currents in the earth’s mantle are thought to be
the driving force of plate tectonics
. Where the hot magma is brought near the surface by the convection currents a divergent boundary is created. The divergent boundaries form new oceans and widen existing oceans.
What are 4 examples of convection?
- Breeze. The formation of sea and land breeze form the classic examples of convection. …
- Boiling Water. Convection comes into play while boiling water. …
- Blood Circulation in Warm-Blooded Mammals. …
- Air-Conditioner. …
- Radiator. …
- Refrigerator. …
- Hot Air Popper. …
- Hot Air Balloon.
How do you create a convection current?
- Fill the plastic container 2/3 full of room temperature water.
- Let the water sit for 30 seconds or until it is completely still.
- Place a blue ice cube at one end of the plastic container.
- Add two drops of red food coloring to the water at the opposite end of the plastic container.
What is the importance of mantle convection?
This flow, called mantle convection, is an important method of heat transport within the Earth. Mantle convection is
the driving mechanism for plate tectonics
, which is the process ultimately responsible for producing earthquakes, mountain ranges, and volcanos on Earth.
How are convection currents used in everyday life?
radiator – A radiator puts warm air out at the top and draws in cooler air at the bottom.
steaming cup of hot tea
– The steam you see when drinking a cup of hot tea indicates that heat is being transferred into the air. ice melting – Ice melts because heat moves to the ice from the air.
What are convection currents created by?
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.
Which is the result of convection quizlet?
During convection, heated particles of a fluid begin to flow, transferring heat energy from one part of the fluid to another. Heat transfer by convection is caused by
differences in temperature and density within a fluid
. Example – Heating a pot of soup on a stove.
