1. (8th) Chapter 14-2 Cornell Notes
The Sun

2. Chapter 14-2 Cornell Notes
1. Why does the
Sun have such
strong gravity?
Key Questions
Why do sunspots look darker?
Clue: think of
temperature.

3. Chapter 14-2 Cornell Notes
nuclear fusion-
core-
radiation zone-
convection zone-
photosphere-
chromosphere-
corona-
solar wind-
sunspot-
prominence-
solar flare-
Key Terms

4. Chapter 14-2 Cornell Notes Heading 1
Energy from the Sun
Sun’s mass 99.8 % of the solar system;
Sun’s energy from nuclear fusion in the core;
hydrogen atoms combine to form helium;
Inner pressure balanced by weight of the sun.

5. Chapter 14-2 Cornell Notes Heading 2
The Sun’s Interior
Sun doesn’t have a surface;
Sun’s interior: core, radiation zone, convection zone;
core: heat and light produced;
radiation zone: middle zone, tightly packed gas, electromagnetic radiation;
convection zone: outer layer, hot and cooler gases circulate.

6. Chapter 14-2 Cornell Notes Heading 3
The Sun’s Atmosphere
Sun’s atmosphere: photosphere, chromosphere, corona;
photosphere: inner layer, gives off visible light;
chromosphere: middle layer, reddish glow during eclipse:
corona: fainter glow, sends out charged particles called the “solar wind”.

7. Chapter 14-1 Cornell Notes Heading 4
Features on the Sun
Sun’s features: sunspots, prominences, solar flares;
sunspots: dark spots from cooler T;
prominences: loops of gas, sometimes gives out great energy (E);
solar flare: prominences escaping into space; can add to solar wind.