Where Does The Heat Come From That Drives The Convection Current In The Mantle


Where Does The Heat Come From That Drives The Convection Current In The Mantle?

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Where does the heat come from that drives this convection current in the mantle quizlet?

heat from the core and the mantle itself causes convecton currents in the mantle.

What drives the convection currents in the mantle?

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 causes convection in the atmosphere?

Convection happens because warm air is less dense than the cold air around it so it is lighter and rises or goes up in the atmosphere. … There is a constant balancing act going on all the time in our atmosphere as moist warm air goes upward and cooler denser air moves down.

What happens during convection?

Convection occurs when particles with a lot of heat energy in a liquid or gas move and take the place of particles with less heat energy. Heat energy is transferred from hot places to cooler places by convection. Liquids and gases expand when they are heated. … As a result the particles take up more volume.

How does convection occur in the mantle?

The mantle is heated from below (the core) and in areas that are hotter it rises upwards (it is buoyant) whereas in areas that are cooler it sink down. This results in convection cells in the mantle and produces horizontal motion of mantle material close to the Earth surface.

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What is the process of convection in the mantle?

Mantle convection is the process by which the excess heat in the Earth’s deep interior is transferred to its surface through the fluid-like motions of the rocks in the mantle. … Convection occurs in the Earth’s mantle because it is the most efficient way for the Earth to cool or dispose of its deep-seated heat content.

Where does convection occur?


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…

How does the Earth’s mantle react on the process of convection current?

Mantle convection is the very slow creeping motion of Earth’s solid silicate mantle caused by convection currents carrying heat from the interior to the planet’s surface. … This hot added material cools down by conduction and convection of heat.

How are convection currents produced in the air?

Convection currents form because a heated fluid expands becoming less dense. The less-dense heated fluid rises away from the heat source. … For instance a hot radiator heats the air immediately around it. The air rises toward the ceiling pulling cooler air down from the ceiling into the radiator to be heated.

What is convection in simple words?

Definition of convection

1 : the action or process of conveying. 2a : movement in a gas or liquid in which the warmer parts move up and the cooler parts move down convection currents. b : the transfer of heat by convection foods cooked by convection — compare conduction radiation.

How is mantle convection related to plate tectonics?

Geologists have hypothesized that the movement of tectonic plates is related to convection currents in the earth’s mantle. … Tremendous heat and pressure within the earth cause the hot magma to flow in convection currents. These currents cause the movement of the tectonic plates that make up the earth’s crust.

What is convection and examples?

Everyday Examples of Convection

boiling water – When water boils the heat passes from the burner into the pot heating the water at the bottom. This hot water rises and cooler water moves down to replace it causing a circular motion. … ice melting – Ice melts because heat moves to the ice from the air.

Is convection heat transferred?

Convection. Convective heat transfer is the transfer of heat between two bodies by currents of moving gas or fluid. In free convection air or water moves away from the heated body as the warm air or water rises and is replaced by a cooler parcel of air or water.

What is convection current physics?

A convection current is a process that involves the movement of energy from one place to another. It is also called convection heat transfer. … These things happen as a result of the Convection Currents. The convection currents tend to move a fluid or gas particles from one place to another.

What is a convection current in geography?

Convection currents that occur within the molten rock in the mantle act like a conveyor belt for the plates. Tectonic plates move in different directions. … The friction between the convection current and the crust causes the tectonic plate to move. The liquid rock then sinks back towards the core as it cools.

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Where do convection currents occur in the atmosphere?

Convection takes place in the atmosphere in the oceans and in Earth’s molten subcrustal asthenosphere. Convective currents of air in the atmosphere are referred to as updrafts and downdrafts.

How are convection currents in the mantle and in the oceans different?

The temperature differences in water cause ocean currents that vertically mix masses of water at different temperatures. … Convective currents in the mantle move slowly (at a maximum inches per year) but may last millions of years. Convection in Earth’s mantle drives motion of the lithospheric plates.

How does convection transfer heat for kids?

Convection is a way in which heat travels. … Natural convection occurs when fluids are heated. When the fluid molecules are heated the fluid becomes larger and lighter. The heated molecules take up more space and rise to the top while the cooler molecules sink to the bottom.

What is convection of heat in water?

Heat Convection

Convection is heat transfer by mass motion of a fluid such as air or water when the heated fluid is caused to move away from the source of heat carrying energy with it. … Hot water is likewise less dense than cold water and rises causing convection currents which transport energy.

What is conduction and convection of heat?

Conduction: This is a flow of heat by direct contact. Heat travels from a warmer object toward a colder object. … Convection: This is a transfer of heat by mixing a fluid. Convection occurs within liquids and gases. Examples include boiling water and when warm water mixes with cold water.

How is the convection of heat in the mantle related to the movement of lithospheric plates over the asthenosphere?

Heat from deep within Earth is thought to keep the asthenosphere malleable lubricating the undersides of Earth’s tectonic plates and allowing them to move. Convection currents generated within the asthenosphere push magma upward through volcanic vents and spreading centres to create new crust.

How is convection current related to movement of plates?

The convection currents move the plates. Where convection currents diverge near the Earth’s crust plates move apart. Where convection currents converge plates move towards each other. The movement of the plates and the activity inside the Earth is called plate tectonics .

What objects uses convection current?

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. …
  • Radiator. …
  • Refrigerator. …
  • Hot Air Popper. …
  • Hot Air Balloon.

How is heat from the Earth transferred by convection?

Convection is the transfer of heat energy in a fluid. … Air in the atmosphere acts as a fluid. The sun’s radiation strikes the ground thus warming the rocks. As the rock’s temperature rises due to conduction heat energy is released into the atmosphere forming a bubble of air which is warmer than the surrounding air.

Is convection in the atmosphere?

In meteorology convection refers primarily to atmospheric motions in the vertical direction. … As the bottom of the pot (earth’s surface) begins to heat the water (lower atmosphere) warmer and less dense water evaporates and rises (thermal) into the drier colder air above the pot (middle atmosphere).

Why is convection a method of heat transfer?

When a fluid such as air or a liquid is heated and then travels away from the source it carries the thermal energy along. This type of heat transfer is called convection. … This forces down the cooler air so that it becomes heated thus creating a convection current.

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In which layer does mantle convection occur?

The heat rising from the Earth’s core creates convection currents in the plastic layer of the mantle (asthenosphere). The convection currents slowly move the tectonic plates above them in different directions. Convection currents occur because hot fluids are less dense than cold fluids.

How does convection affect Earth’s oceans?

Thermal energy also moves within the ocean and within the atmosphere through the process of convection. During convection cooler water or air sinks and warmer water or air rises. This movement causes currents. … These currents move water all around the earth bringing warm water to cooler areas and vice versa.

What creates the convection current inside Earth?

The Earth’s crust is broken up into pieces called plates. The crust moves because of movements deep inside the earth. Heat rising and falling inside the mantle creates convection currents generated by radioactive decay in the core. The convection currents move the plates.

What are 3 facts about convection?

Facts about convection:
  • The heat source and liquid are needed to form convection current therefore heat transfer can be conducted.
  • Convection occurs in the atmosphere. …
  • Magma is considered as the fluid while the core of the earth is called as the heat source.
  • Convection is important since it can affect the weather.

Where the heat is being transferred by conduction by convection and by radiation?

Mark where the heat is being transferred by conduction by convection and by radiation. i) Transfer of heat from burner to pan is take place through radiation. ii) Transfer of heat from pan to water is take place through conduction. iii) Transfer of heat within water is take place through convection.

How is heat transferred?

Heat can be transferred in three ways: by conduction by convection and by radiation. Conduction is the transfer of energy from one molecule to another by direct contact. … Conduction takes place in solids liquids and gases but works best in materials that have simple molecules that are located close to each other.

What does heat transfer by convection Apex mean?

Thermal energy is transferred from hot places to cold places by convection. Convection occurs when warmer areas of a liquid or gas rise to cooler areas in the liquid or gas. Cooler liquid or gas then takes the place of the warmer areas which have risen higher. This results in a continous circulation pattern.

Plates moving due to convection in mantle | Cosmology & Astronomy | Khan Academy


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