Quick Answer: What Are The Convection Currents In The Mantle?

What are convection currents in the mantle for kids?

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 happens when convection currents occur?

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 5 facts about the mantle?

Planet EarthThe Mantle is the second layer of the Earth. … The mantle is divided into two sections. … The average temperature of the mantle is 3000° Celsius. … The mantle is composed of silicates of iron and magnesium, sulphides and oxides of silicon and magnesium.The mantle is about 2900 km thick.More items…

What is the special feature of the mantle?

The special about the upper mantle is its ability to flow like fluid. The upper mantle has soft weak layer called the asthenosphere, which capable of flowing. This property facilitates the movement of lithospheric plates.

Why are convection currents in the mantle?

Heat from the core and the mantle itself causes convection currents in the mantle. … Many geologists think that plumes of mantle rock rise slowly from the bottom of the mantle toward the top. The hot rock eventually cools and sinks back through the mantle. Over and over, the cycle of rising and sinking takes place.

How fast do convection currents in the mantle move?

The convection currents in the much hotter mantle continually move the plates about 1/2 to 4 inches per year.

What may happen if there were no convection currents in the mantle?

Answer 1: If all convection currents on Earth stopped that would be a natural disaster. The amount of heat which the sun radiates at us sets the temperature of the Earth’s surface. … So if convection completely stopped the high and low temperatures would force people and animals to move away from the poles and equator.

What are 4 examples of convection?

Examples of ConvectionBoiling water – The heat passes from the burner into the pot, heating the water at the bottom. … Radiator – Puts warm air out at the top and draws in cooler air at the bottom.Steaming cup of hot tea – The steam is showing heat being transfered into the air.Ice melting – Heat moves to the ice from the air.More items…

What is the difference between upper mantle and lower mantle?

There are very small differences between the two layers. The upper mantle has Olivine (a very special rock), compounds with silicon dioxide, and a substance called Peridotite. The lower mantle is more solid than the upper mantle.

What is a convection current and what causes it?

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.

How do convection currents in the mantle affect the earth?

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.

In which layer does mantle convection occur?

AsthenosphereMantle convection occurs in the: Asthenosphere.

What is an example of a convection current?

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 causes the mantle to flow?

The mantle flows because of convection currents that are caused by very hot material in the mantle rising, cooling, and then sinking. This circular pattern causes the mantle to flow.

What will happen to the convection currents in the mantle if the Earth’s interior eventually cools down?

heat from the core and the mantle itself causes convecton currents in the mantle. > If the convection currents eventually cool down then it will continue to cool down unless it got heat added to it. This would cause the magnetic field to stop.