What Happens 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 the purpose of the convection zone of the Sun?
Convection continues to be efficient in transporting heat until layers are reached where the density is so low that radiation from the hot up-flowing gas can escape directly into space. This layer is the visible surface of the Sun known as the photosphere.
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.
How does a convection zone transfer energy?
In the convection zone energy is transported by the movement of the plasma or the hydrogen and the helium ions. Plasma churns vigorously transporting heat energy to the surface of the Sun through convection.
Does the Sun use convection?
The source of the Sun’s energy is the nuclear reactions that occur in its core. … This type of energy transport is convection. Convection motions within the solar interior generate magnetic fields that emerge at the surface as sunspots and loops of hot gas called prominences.
Does the Sun have a convective core?
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.
How does energy move through the convection zone of the sun?
The convective (or convection) zone is the region inside a star where energy flows outwards using the process of convection. From there when the energy reaches the visible glowing surface of the Sun the photosphere it will be radiated out into space.
What occurs as energy is transferred through the convective zone of the sun?
What occurs as energy is transferred through the convective zone of the Sun? … Energy is transferred through the large-scale movement of material. Energy is released into the photosphere.
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.
Where does convection occur in a star?
What visible evidence do we have that the sun has a convective zone?
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.
Where does fusion take place in the sun?
The type of nuclear reaction taking place in the core of the Sun is known as nuclear fusion and involves hydrogen nuclei combining together to form helium. In the process a small amount of mass (just under one per cent) is released as energy and this makes its way to the Sun’s surface before beaming out into space.
What happens in the convection process?
convection process by which heat is transferred by movement of a heated fluid such as air or water. Natural convection results from the tendency of most fluids to expand when heated—i.e. to become less dense and to rise as a result of the increased buoyancy.
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 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.
Are 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.
What layer of the Sun is the chromosphere?
The chromosphere is above the photosphere the visible “surface” of the Sun. It lies below the solar corona the Sun’s upper atmosphere which extends many thousands of kilometers above the chromosphere into space. The plasma (electrically charged gas) in the chromosphere has a very low density.
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 does energy generated by fusion make its way to the sun’s surface?
-Solar energy production remains steady because the rate of nuclear fusion is very sensitive to temperature. -When two protons fuse to make a hydrogen nucleus which the fuses with a proton to makes a nucleus of helium. … -The hotter gases drift up until the energy can escape to the photosphere or surface of the Sun.
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.
Where does convection happen in the 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.
What element will build up in the sun’s core causing all fusion in the sun to stop?
The Sun has about 5 billion years worth of hydrogen with which it can produce energy. When five billion years are up fusion in the Sun’s core will cease and gravity will cause the star to collapse.
How does energy move in the sun?
What is the result of the first step of fusion?
What is the first step of the hydrogen fusion process? … Hydrogen nuclei fuse to form a larger nucleus and a small amount of mass is converted into energy.
How hot is the convective zone of the sun?
about 2 000 000° C.
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 first step in the fusion process?
Does Fusion happen in the Sun?
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.
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.
What is convection in astronomy?
Convection is the transfer of heat through fluid (liquid or gas). It probably relates to astronomy in that due to gravity a star’s core is much hotter than the rest of it.
Which stars have convective cores?
High-mass main sequence stars have convective cores intermediate-mass stars have radiative cores and low-mass stars are fully convective.
What causes the movement of gases in the convective zone?
Convection cells in the sun’s convective zone carry energy from the top of the radiative zone to the photosphere. In convection cells hot gases rise to the photosphere cool and then sink back into the convective zone. … Venus has a thin atmosphere and solar energy reaches the surface easily.
How does matter move in the convection zone?
In the convective zone heat and energy are carried outward along with matter in swirling flows called convection cells. This motion is similar to the roiling flows seen in a pot of boiling water. The inner parts of the Sun (core and radiative zone) spin differently than the outer layers (convective zone).
Less Than Five – Layers of the Sun Explained – Inner Layers
Convective Zone (Layers of the Sun)
Convection Zone of the Sun # Lecture 5
Thermal Transport in the Sun II: Convection