# Short-Questions

Fast solutions for complex problems

23

## What drives the convection current in the earth?

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.

## Where does the energy that drives convection currents inside the Earth’s crust come from?

Focus Question: What is the source of energy for convection currents in the geosphere? Convection currents in the magma drive plate tectonics. Heat generated from the radioactive decay of elements deep in the interior of the Earth creates magma (molten rock) in the aesthenosphere.

What are convection currents taking place within the Earth’s interior?

Convection currents within Earth’s mantle form as material near the core heats up. As the core heats the bottom layer of mantle material, particles move more rapidly, decreasing its density and causing it to rise. The rising material begins the convection current.

### What are the three main sources of convection?

There are three common modes of heat transfer – conduction, convection, and radiation….What is Convection?

• Convection is the process of heat transfer in fluids by the actual motion of matter.
• It happens in liquids and gases.
• It may be natural or forced.
• It involves a bulk transfer of portions of the fluid.

### What is happening with convection?

rock cools, the density increases, causing the material to sink. What causes the convection cell to turn to the left at point B? lithosphere forcing the convection current to turn left. Temperature increases (closer to the core) and density decreases as a result.

What would happen if there were no convection currents?

If for some reason convection stopped, air would not circulate, and weather would stop. Air wouldn’t flow over the waters, suck up moisture and then rain it out on land. Without this rain, all plants and crops would die.

## What are the steps of convection currents?

Convection currents form because a heated fluid expands, becoming less dense. The less-dense heated fluid rises away from the heat source. As it rises, it pulls cooler fluid down to replace it. This fluid in turn is heated, rises and pulls down more cool fluid.

## What is a good example of convection?

Everyday Examples of Convection 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 4 examples of convection?

13 Examples Of Convection In Everyday Life

• 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.
• Refrigerator.
• Hot Air Popper.
• Hot Air Balloon.

### Why do convection currents turn left?

Also this point is where the fluid in the convection begins to heat up, before rising to point B where it cools. This causes the cell to turn left because the flow of fluid hits the bottom of the crust/lithosphere, and is forced to turn left.

### Where can convection currents occur?

mantle
Convection currents in the Earth occur in the mantle. The core of the Earth is extremely hot, and material in the mantle close to the core is heated…

Why is convection current in the asthenosphere important?

Convection currents generated within the asthenosphere push magma upward through volcanic vents and spreading centres to create new crust. According to the theory of plate tectonics, the asthenosphere is the repository for older and denser parts of the lithosphere that are dragged downward in subduction zones.

## What are 5 facts about convection currents?

Vertical circulation within a fluid that results from density differences caused by temperature variations. In meteorology, the process in which air, having been warmed close to the ground, rises. Within the Earth, the radiogenic heat release results in convective motions causing tectonic plate movements.

## What are the convection currents and what causes them?

Convection currents are movements caused by temperature changes in liquid or gaseous bodies. In such bodies, warmer material tends to rise, displacing cooler matter, which is circulated elsewhere; the continuous movement created by this process is known as a convection cell.

What are convection currents and how do they happen?

Convection currents are the movement of fluid as a result of differential heating or convection. In the case of the Earth, convection currents refer to the motion of molten rock in the mantle as radioactive decay heats up magma, causing it to rise and driving the global-scale flow of magma.

### What energy source drives convection?

The sun is the external source of energy that causes convection currents, which drive the winds, ocean currents, and the water cycle. The Earth receives more solar energy at the Equator than at the poles.