CHAPTER 24.3 THE SUN. Learning Targets 1.Describe the layers of the Sun 2.Describe the surface...
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Transcript of CHAPTER 24.3 THE SUN. Learning Targets 1.Describe the layers of the Sun 2.Describe the surface...
CHAPTER 24.3 THE SUN
Learning Targets
1. Describe the layers of the Sun2. Describe the surface features of
the Sun
The Sun
1. 99.8% of all matter in the solar system
2. Average star3. Fourth State of Matter – Plasma :
Made up of superheated gas with an electrical charge Hydrogen to Helium
Solar Layers
1. The sun has no surfacea) Layers and zones can be
detected but there are no clear lines
b) Like fire
Internal Structure of the Sun
1. Corea) 27,000,000°Cb) Nuclear fusion releases energy
2. Radiative zonea) Photons release energy moves away from
the core3. Convection zone
a) Hot particles rise and cooler particles sinki. Convection helps to create solar flares
and sunspots
The Outer Layers
1. Photospherea) Layer that we seeb) Radiates visible light
2. Chromospherea) Glows red & heated by photosphere
3. Coronaa) Outermost plasma layerb) Hottest layerc) Only visible when photosphere is
blocked
Surface Features
1. Sunspots - Loops of magnetic energy make the Sun cooler in places
a) Occur in 11-year cyclesb) Form solar flares when the loops
break2. Solar flares release energy and
particlesa) Solar windb) Produces aurora in Earth’s
thermosphere3. Solar prominence: plasma flows along
the loop from sunspot to sunspot