Quick Answer: Which Layer Does Mantle Convection Occur?

Why does convection occur 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..

Which layer is the mantle?

The mantle is the mostly-solid bulk of Earth’s interior. The mantle lies between Earth’s dense, super-heated core and its thin outer layer, the crust. The mantle is about 2,900 kilometers (1,802 miles) thick, and makes up a whopping 84% of Earth’s total volume.

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.

How long is the crust of the earth?

The crust thickness averages about 18 miles (30 kilometers) under the continents, but is only about 3 miles (5 kilometers) under the oceans. It is light and brittle and can break.

Where is the youngest crust on Earth most likely located Weegy?

mid-ocean ridgeThe youngest crust on Earth is most likely located at the mid-ocean ridge.

What is the coldest layer?

MesosphereMesosphere, altitude and temperature characteristics The top of the mesosphere is the coldest area of the Earth’s atmosphere because temperature may locally decrease to as low as 100 K (-173°C).

How does a convection current work in the mantle?

Convection currents in the air and sea lead to weather. Magma in the Earth’s mantle moves in convection currents. The hot core heats the material above it, causing it to rise toward the crust, where it cools. … The magma can’t continue to rise, so it moves horizontally and sinks back down.

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…

In which layer does mantle convection occur Weegy?

Weegy: The layer of the earth where mantle convection occurs and on which the earth’s crust rests is the asthenosphere. Weegy: The layer of the earth that forms the earth’s plates is the lithosphere. This answer has been confirmed as correct and helpful.

What are two factors that cause convection?

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.

Where does mantle convection occur?

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. The Earth’s surface lithosphere rides atop the asthenosphere and the two form the components of the upper mantle.

What would happen if convection currents in the mantle stopped?

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.

How many layers are in the mantle?

twoThe Earth’s mantle is divided into two major rheological layers: the rigid lithosphere comprising the uppermost mantle, and the more viscous asthenosphere, separated by the lithosphere-asthenosphere boundary.

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…