What Is The Convection Zone Of The Sun

What Is The Convection Zone Of The Sun?

The convection zone is the outer-most layer of the solar interior. It extends from a depth of about 200 000 km right up to the visible surface. At the base of the convection zone the temperature is about 2 000 000° C.Oct 1 2015

What is the convection zone of the Sun and what does it do?

The convection zone is the outer-most layer of the interior. It extends from a depth of 200 000 km up to the visible surface of the Sun. Energy is transported by convection in this region. The surface of the convection zone is where light (photons) is created.

What happened in the convection zone of the Sun?

In the convective zone the temperatures are cool enough—under 1 800 000 degrees Fahrenheit (1 000 000 degrees Kelvin)—that the atoms in the plasma there can absorb the photons coming outward from the Sun’s radiative zone. The plasma gets very hot and begins to rise upward out of the Sun.

What is convection zone in the Sun quizlet?

Convective zone. The region of the sun’s interior that is between the radiative zone and the photosphere and which energy is carried upward by convection. photosphere. the visible surface of the sun.

Does the Sun have a convection zone?

Convection Zone of the Sun

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Above the radiative zone is the convection zone which spans the outer 30% of the Sun’s interior. The convection zone begins when the temperatures are low enough that radiation isn’t a dominant form of heat transfer.

What is convection sun?

Convection in the Sun

Hot plasma rises from the core towards the surface where it cools and sinks back towards the core. This process forms convection cells that we see as solar granules. The lighter color in the granules is the sun’s hot plasma that has risen to the surface.

What is the sun powered by?

Solar energy is created by nuclear fusion that takes place in the sun. Fusion occurs when protons of hydrogen atoms violently collide in the sun’s core and fuse to create a helium atom. This process known as a PP (proton-proton) chain reaction emits an enormous amount of energy.

What is the purpose of convection zone?

A region of turbulent plasma between a star’s core and its visible photosphere at the surface through which energy is transferred by convection. In the convection zone hot plasma rises cools as it nears the surface and falls to be heated and rise again.

What happens to the energy in the convective zone of the sun?

What happens to energy in the Sun’s convection zone? Energy is transported outward by the rising of hot plasma and sinking of cooler plasma. … We are seeing hot gas rising and cool gas falling due to the convection that occurs beneath the surface.

Why does a convective layer exist in the sun?

The rotation rate of the sun changes rapidly in the tachocline. At around 70% of the sun’s radius the convective zone begins. In this zone the sun’s temperature is not hot enough to transfer energy by thermal radiation. Instead it transfers heat by thermal convection through thermal columns.

What is one characteristic of the convection zone inside the Sun quizlet?

In the convective zone the energy is transferred much faster than it is in the radiative zone. This is because it is transferred through the process of convection. Hotter gas coming from the radiative zone expands and rises through the convective zone.

What are granules on the sun quizlet?

Granules on the photosphere of the Sun are caused by convection currents of plasma within the Sun’s convective zone. The grainy appearance of the solar photosphere is produced by the tops of these convective cells and is called granulation. It indicates that convection is taking place from the interior.

What is the evidence for the sun’s convection?

The convection current is occupied by the rising and sinking gas. Thus we can infer that the motion of the gas is from the numerous tiny bright regions surrounded by darker zone which is called granulation. Therefore granulation is the visible evidence from where we know Sun has a convection zone.

What parts of the star are convective?

The outer portion of solar mass stars is cool enough that hydrogen is neutral and thus opaque to ultraviolet photons so convection dominates. Therefore solar mass stars have radiative cores with convective envelopes in the outer portion of the star.

Which layer of the Sun is where fusion occurs?


The Sun’s interior domain includes the core the radiative layer and the convective layer (Figure 2–1). The core is the source of the Sun’s energy the site of thermonuclear fusion.

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What is star convection?

Convection is a flux of matter from deeper (hotter) layers in the star moving vertically outward into cooler layers and material from cooler outer layers into hotter inner layers. Thus it can redistribute heat within the star.

Where does conduction occur in the Sun?

Conduction the collisional transfer of energy between atoms only occurs between solids (such as a hot pan and your hand) so is not found in the Sun.

What is the chromosphere of the Sun?

The lower region of the Sun’s atmosphere is called the chromosphere. Its name comes from the Greek root chroma (meaning color) for it appears bright red when viewed during a solar eclipse. The chromosphere extends for about 2 000 kilometers (1 200 miles) above the visible surface of the Sun.

How do convection occur?

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. … Convection currents can be seen in lava lamps.

How does fusion power the Sun?

Fusion is the process that powers the sun and the stars. It is the reaction in which two atoms of hydrogen combine together or fuse to form an atom of helium. In the process some of the mass of the hydrogen is converted into energy. … The sun and stars do this by gravity.

How does fusion work in the Sun?

Inside the Sun this process begins with protons (which is simply a lone hydrogen nucleus) and through a series of steps these protons fuse together and are turned into helium. This fusion process occurs inside the core of the Sun and the transformation results in a release of energy that keeps the sun hot.

Is the Sun fission or fusion?

The Sun is a main-sequence star and thus generates its energy by nuclear fusion of hydrogen nuclei into helium. In its core the Sun fuses 500 million metric tons of hydrogen each second. The nuclear binding energy curve.

Where does convection occur in a star?

In a massive star the convection zone is in the core and the radiation zone is between surface and core. Because large stars (more than 8 solar masses)can fuse multiple elements until iron-56 so the fuel in the core should be convected from the inner core and outer core.

What does the corona of the Sun do?

The corona is in the outer layer of the Sun’s atmosphere—far from its surface. Yet the corona is hundreds of times hotter than the Sun’s surface. … In the corona the heat bombs explode and release their energy as heat. But astronomers think that this is only one of many ways in which the corona is heated.

How hot is the convection zone of the Sun in Fahrenheit?

about 3.6 million F.

In the next zone called the convective zone plasma bubbles carry heat to the surface. This zone hits about 3.6 million F. Next energy reaches the surface of the sun or photosphere producing the light visible from Earth and a comparatively chilly 10 000 F (5 500 C ).

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How hot is the chromosphere of the Sun?

about 36 000 degrees F.
the chromosphere is the innermost atmospheric layer. It is just above the photosphere. Here the temperature begins to rise again to about 36 000 degrees F.

How does heat energy move through the convection zone of the Sun quizlet?

Energy from the radiation zone passes into the convection zone the outer layer of the sun’s interior. In the convection zone energy is transferred outward mainly by convection currents. Hot gases in the convection zone rise toward the sun’s atmosphere while cooler gases sink downward.

How do movements in the convection zone contribute to solar flares?

The convection zone surrounds the radiative zone. In the convection zone hot material from near the Sun’s center rises cools at the surface and then plunges back downward to receive more heat from the radiative zone. This movement helps to create solar flares and sunspots which we’ll learn more about in a bit.

Does Fusion happen in the Sun?

In the core of the Sun hydrogen is being converted into helium. This is called nuclear fusion. It takes four hydrogen atoms to fuse into each helium atom. During the process some of the mass is converted into energy.

Why are low mass stars convective?

Stars like the Sun (low mass stars) have temperatures in their outer envelopes which are low enough that hydrogen is not ionized. So higher energy photons from the interior of the star are easily absorbed by the hydrogen — the outer portions of low mass stars have high opacity and are thus convective.

Which one of the following is convective layer of the atmosphere?


While in the troposphere convective gravity waves can affect the stability and modify further convective development. In the troposphere stratosphere and mesosphere the dissipation of convective gravity waves exerts a tendency on the mean flow and thereby contributes to the momentum budget of those layers.

What are granules seen on the surface of the Sun?

A granule is a convection cell in the Sun’s photosphere. They are caused by convection currents of plasma in the Sun’s convective zone directly below the photosphere. The grainy appearance of the solar photosphere is produced by the tops of these convective cells and is called granulation.

What are Supergranules on the Sun?

Supergranules cover the sun’s visible surface (photosphere) in a network of “cells” called supergranulation. The cells are amorphous regions of horizontal outflows of electrified gas (plasma). Supergranules get their name from their resemblance to smaller features in the photosphere called granules.

Which is the hottest zone of the Sun?

Core. The hottest part of the Sun is the core at 28 080 000°F on average.Mar 27 2009

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