What evidence is there that shows granulation is caused by convection?
What evidence do we have the granulation seen on the sun's surface is caused by convection? The bright centers of granules are hotter than their dark boundaries AND doplar measurements indicate that the centers are rising and the edges are sinking.
Is granulation is caused by convection currents just below the photosphere?
Granulation is caused by rising currents of hot gas below the photosphere.
What is the explanation for the pattern of granulation?
What is the explanation for the pattern of granulation seen on the visible surface of the Sun? The granules are the tops of hot gas that have risen from the Sun's convective zone. The gas motions within granules on the solar surface are: upward in bright cell centers and downward around the darker edges.
What causes granulation in the photosphere of the Sun?
Close-up views of the photosphere also show patterns of light areas surrounded by darker borders, called "granulation." Similar to the patterns you can see at the top of a pot of boiling water or oatmeal, granulation is caused by heat rising upward to the photosphere from the hotter solar interior.
What occurs in the 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 is the reason that the evidence in Part B suggests the type of energy transport in Part A )?
What is the reason that the evidence in part (b) suggests the type of energy transport in part (a)? The sun gives off radiation. There is no evidence of the types of energy transport occurring in the sun. These features are at a much lower temperature than the rest of the photosphere.
Is granulation is caused by rising currents of hot gas below the photosphere?
In the sun, rising currents of hot gas below the photosphere cause granulation. energy is produced in the form of gamma rays and the velocity of the created nuclei.
What causes granulation tissue?
Granulation tissue formation is part of a normal healing process. Under certain conditions, such as infection, self-mutilation, or a local reaction to a chronically implanted, foreign material, this tissue grows uncontrollably and becomes very vascular and secretive.
What makes up granulation tissue?
Cells and proliferating capillaries are the two major components of granulation tissue. The cells are chiefly fibroblasts and inflammatory cells— macrophages, lymphocytes, plasma cells, and neutrophils depending on the stage and development of the granula- tion tissue and the presence of infection.
What does the convection zone of the Sun 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 causes convection in the convection zone?
Convection occurs through the movement of particles. As particles become heated, the molecules move faster and faster, and as molecules move apart, density decreases. The warmer, less dense material rises compared to the surrounding cooler, higher density material.
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.
What evidence can you give that sunspots and prominences are magnetic?
Finally, to answer your question: astronomers know that sunspots are associated with magnetic fields because they can look at the spectral lines that come from the sunspots and measure by how much these lines are split.
What is the evidence in the photosphere of the type of energy transport occurring beneath it?
What is the evidence in the photosphere of the type of energy transport occurring beneath it? A certain type of energy transport (radiation, convection, or conduction) occurs just below the photosphere.
What evidence can you give that the corona has a very high temperature?
What evidence can you give that the corona has a very high temperature? Its spectrum shows that atoms in the corona are highly ionized so the gas must be at a high temperature. What color is the photosphere as viewed from the ground on a clear, cloudless day when the Sun is highest overhead?
How do you identify granulation tissue?
What Does Granulation Tissue Look Like? Granulation tissue often appears as red, bumpy tissue that is described as “cobblestone-like” in appearance. It is highly vascular, and this is what gives this tissue its characteristic appearance. It is often moist and may bleed easily with minimal trauma.
What is formed from granulation tissue quizlet?
Formation of granulation tissue, which late matures to form fibrous scar tissue.
What is granulation in 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 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.
What happens during convection?
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.
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.
What are the effects of convection?
Convection works by areas of a liquid or gas heating or cooling greater than their surroundings, causing differences in temperature. These temperature differences then cause the areas to move as the hotter, less dense areas rise, and the cooler, more dense areas sink.
What are some examples of convection?
Everyday Examples of Convection radiator – A radiator puts warm air out at the top and draws in cooler air at the bottom. steaming cup of hot tea – The steam you see when drinking a cup of hot tea indicates that heat is being transferred into the air. ice melting – Ice melts because heat moves to the ice from the air.
What is the evidence in the photosphere of the type of energy transport occurring beneath it quizlet?
What is the evidence in the photosphere of the type of energy transport occurring beneath it? A certain type of energy transport (radiation, convection, or conduction) occurs just below the photosphere.
What is the reason that the evidence in Part B suggests the type of energy transport in Part A?
What is the reason that the evidence in part (b) suggests the type of energy transport in part (a)? The sun gives off radiation. There is no evidence of the types of energy transport occurring in the sun. These features are at a much lower temperature than the rest of the photosphere.
Is anything hotter than the Sun?
China's Experimental Advanced Superconducting Tokamak (EAST) set a world record by reaching temperatures exceeding 100 million degrees Celsius with its hydrogen fusion process. The resulting temperature is nearly six times hotter than our solar system's Sun, which glows at 15 million degrees Celsius.
What causes granulation tissue to form?
TGF-β is a growth factor produced by both fibroblasts and keratinocytes during the wound healing process and has been shown to induce granulation tissue formation and the differentiation of myofibroblasts. The keratinocytes are responsible for re-epithelialization of the epidermis after injury.
What is formed from granulation tissue?
Granulation tissue is vascularized tissue that forms as chronic inflammation evolves. The new capillaries make the tissue appear pink and granular, thus the name. Histologically, one can observe macrophages and proliferating fibroblasts within granulation tissue.
What is granulation tissue?
Granulation tissue is considered a contractile organ, characterized histologically by the presence and proliferation of fibroblasts, keratinocytes, endothelial cells, new thin-walled capillaries, and inflammatory cell infiltration of the extracellular matrix.
What happens to energy in the convection zone of the Sun?
What happens to energy in the Sun's convection zone? Energy is produced in the convection zone by nuclear fusion. Energy is transported outward by the rising of hot plasma and sinking of cooler plasma.