Where Is The Density Of The Material Greater

Where is the density of material greater?

Answer: The density is greater at point C. At point C the magma si cooling as the magma cools the particles move slower and the density increases and gravity pulls the magma back towards the core.

Is the temperature of the mantle material greater?

The temperature of the mantle varies greatly from 1000° Celsius (1832° Fahrenheit) near its boundary with the crust to 3700° Celsius (6692° Fahrenheit) near its boundary with the core. In the mantle heat and pressure generally increase with depth.

Where is the temperature in the mantle greater?

Temperature is greater at point A because it is closer to center of the Earth. Also this is where the rock of the mantle gets hot enough to rise up towards point B due to a change in temperature and density.

What causes the convection cell to turn to the left at the point B?

Point B is in between two convections and is just below a ridge. 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. … It would then flow between points D and A and would adjust to the higher temperature being closer to the earth’s core.

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What happens to the temperature and density of the material between points A and D?

Where is the density of the material greater at point B or point C? … What happens to the temperature and density of the material between points D and A? Heat from the core causes the temperature of the material to rise this means the density will decrease since hotter material is less dense than cooler material. 8.

What is the density of the mantle material that is going up?

4.5 g/cm3

The mantle has a density of 4.5 g/cm3 and temperatures in the range of 1000-1500 oC. The uppermost layer of the mantle is more rigid while the deeper regions are fluid and it is the motion of fluid materials in the mantle that is responsible for plate tectonics (see section 4.3).

What happens to the temperature and density of the mantle material near the core?

As the core heats the bottom layer of mantle material particles move more rapidly decreasing its density and causing it to rise. … The material cools because it is no longer near the core. It eventually becomes cool and dense enough to sink back down into the mantle.

What causes convection?

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 heat that drives the mantle’s convection stream come from?

Convection Currents in the Mantle

Heat in the mantle comes from the Earth’s molten outer core decay of radioactive elements and in the upper mantle friction from descending tectonic plates.

What happens to the thermal energy and density of the material between points B and C?

What happens to the temperature and density of the material between It spreads out as it co points B and C? The temperature cools and density increasas. Crust thicker as well as causes it to move.

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 is in a convection cell?

In the field of fluid dynamics a convection cell is the phenomenon that occurs when density differences exist within a body of liquid or gas. … The colder denser part of the fluid descends to settle below the warmer less-dense fluid and this causes the warmer fluid to rise.

What plate motion is happening at point B?

What happens at point B in a convection current? The magma is rising towards the Lithosphere. It hits the hard Lithosphere and either turns left or right. It can not continue through the Lithosphere.

What happens to the temperature and density?

When temperatures increase objects expand and become larger and therefore the density decreases. When temperatures decrease objects condense and become smaller so density increases.

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.

What happens to the density of a fluid as it temperature increases decreases?

Answer:In general the liquids tend to expand when their temperature increases. For example the same mass of boiling water occupies more volume at 100 degrees Celsius than at 20 degrees Celsius. Therefore increasing temperature decreases density.

Why does the temperature of the layers of the earth change as it goes deeper?

As you head toward the center of the Earth temperatures increase exponentially. … As you move further and further away from the core the crust cools to much colder temperatures all the way up to the surface. The Earth gets hotter as you move towards to center.

What happens when you have a change in temperature or pressure?

For example when the pressure increases then the temperature also increases. When the pressure decreases then the temperature decreases. … Because there is less mass in the can with a constant volume the pressure will decrease. This pressure decrease in the can results in a temperature decrease.

Why is oceanic crust denser than continental?

In the theory of tectonic plates at a convergent boundary between a continental plate and an oceanic plate the denser plate usually subducts underneath the less dense plate. It is well known that oceanic plates subduct under continental plates and therefore oceanic plates are more dense than continental plates.

What is the density of the upper mantle?

It has an average density of 5.5 g/cm3. The structure of the Earth’s upper mantle can be derived from seismic waves. The main layers are the crust the mantle and the core.

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What is the density of the Earth’s crust?

The average density of continental crust is about 2.83 g/cm3 less dense than the ultramafic material that makes up the mantle which has a density of around 3.3 g/cm3. Continental crust is also less dense than oceanic crust whose density is about 2.9 g/cm3.

Where does heat leave the mantle from?

Part of the heat down there is actually left over from the fiery formation of Earth part is from latent heat released by the freezing of liquid iron in the outer core onto the solid inner core and part is (possibly) from the slow decay of naturally radioactive elements like uranium and potassium mixed in the core.

What happens in the inner and outer core?

The center of the Earth is made up of two layers the outer core and the inner core. … The outer core is responsible for Earth’s magnetic field. As Earth spins on its axis the iron inside the liquid outer core moves around. The movement causes powerful electric currents to develop in the liquid iron itself.

What is the heat rising and falling inside the mantle creates current?

Heat rising and falling inside the mantle creates convection currents generated by radioactive decay in the core. The convection currents move the plates. Where convection currents diverge near the Earth’s crust plates move apart.

What makes lithospheric plates move?

Plate Tectonics

The lithosphere is divided into huge slabs called tectonic plates. The heat from the mantle makes the rocks at the bottom of lithosphere slightly soft. This causes the plates to move. The movement of these plates is known as plate tectonics.

What causes the mantle to flow?

Many geologists believe that the mantle “flows” because of convection currents. Convection currents are caused by the very hot material at the deepest part of the mantle rising then cooling sinking again and then heating rising and repeating the cycle over and over.

What is slab pull theory?

Slab pull is the pulling force exerted by a cold dense oceanic plate plunging into the mantle due to its own weight. The theory is that because the oceanic plate is denser than the hotter mantle beneath it this contrast in density causes the plate to sink into the mantle.

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Where does the heat come from that pushes the convection current?

The heat carried by convection currents within the Earth comes from the decay of radioactive isotopes such as uranium—235 uranium-238 thorium-232 potassium-40 etc. heat produced during the formation of the Earth from the release of gravitational energy during the impact of planetesimals and from the decay of short …

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 convection takes place 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.

When thermal energy is increased in a solid What change in state is happening?

When thermal energy is added to a substance its temperature increases which can change its state from solid to liquid (melting) liquid to gas (vaporization) or solid to gas (sublimation).

What happens when thermal energy is removed from a liquid?

The change from the liquid state to the solid state is called freezing. As the liquid cools it loses thermal energy. As a result its particles slow down and come closer together. … During freezing the temperature of a substance remains constant while the particles in the liquid form a crystalline solid.

What happens when thermal energy is added to a solid?

The particles move farther apart and potential energy increases. Once a solid completely melts the addition of thermal energy will cause the kinetic energy of the particles to increase again as shown by a temperature increase.

Why does convection cause movement of material and energy in Earth’s interior?

The lower layer of the mantle which is made up of molten rock flows slowly due to the presence of intense heat and pressure in it. Once the molten rock is heated it rises toward the crust. whereas when it cools it moves back toward the core.

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