What are coronal holes quizlet?
What are coronal holes? areas of the corona where magnetic field lines project into space, allowing charge particles to escape the Sun, becoming part of the solar wind.
What is the cause of the sunspot cycle on the sun quizlet?
What is the cause of the sunspot cycle on the Sun? Subsurface magnetic fields are twisted by the Sun’s differential rotation and break through the surface as sunspots, then gradually cancel each other and return below the surface. its very powerful magnetic field.
Which of the following is evidence that convection occurs in the layers just below the sun’s photosphere?
Which of the following is evidence that convection occurs in the layers just below the suns photosphere? The centers of granules are hot and moving upward away from the center of the sun. Helioseismology is the study of the differential rotation and magnetic field of the sun.
Why is the solar corona so much hotter than the photosphere quizlet?
Why is the solar corona so much hotter than the photosphere? Energy is carried upward through the chromosphere by disturbed and tangled magnetic fields. The umbra of a sunspot is about 1500 K cooler than the surrounding solar photosphere.
What are coronal holes and how are they related to the solar wind?
Coronal holes are the darkest regions of the ultraviolet and X-ray Sun, both on the disk and above the limb. Coronal holes are associated with rapidly expanding open magnetic fields and the acceleration of the high-speed solar wind.
Why do CME occur?
Coronal Mass Ejections (CMEs) are large expulsions of plasma and magnetic field from the Sun’s corona. This can result in the sudden release of electromagnetic energy in the form of a solar flare; which typically accompanies the explosive acceleration of plasma away from the Sun – the CME.
What is the period of the sunspot cycle quizlet?
The sunspot cycle, or the variation in the number of sunspots on the suns surface, has an average period of 11 years.
Why is it that sunspots appear dark on the Sun?
Sunspots are dark, planet-sized regions that appear on the “surface” of the Sun. Sunspots are “dark” because they are cooler than their surroundings. Sunspots are caused by disturbances in the Sun’s magnetic field welling up to the photosphere, the Sun’s visible “surface”.
How is energy transported by convection?
Energy carried from hotter regions below to cooler regions above by bulk buoyant motions of the gas. Everyday examples of convection are boiling water and hot air “rising” off of a candle flame or a radiator.
Which layer of the sun produces energy?
Core
The Core: The core of the sun is the region that extends from the center to about 20–25% of the solar radius. It is here, in the core, where energy is produced by hydrogen atoms (H) being converted into nuclei of helium (He).
Why is the solar chromosphere and corona hotter than the photosphere?
Modern proof for an old theory We needed empirical observation that these waves existed. Our recent study has finally achieved this. It has validated Alfvén’s 80-year-old theory and taken us a step closer to harnessing this high-energy phenomenon here on Earth.
Why is the corona hotter than the chromosphere?
Light shone on star mystery: Why sun’s corona is much hotter than its surface. Their calculations confirm that the MHD waves could be responsible for transporting energy from below the solar surface, out through the chromosphere, into the corona and leading to heating of the outer layers in excess of a million degrees.