The Sun (Our Enemy)

Interior 1. Nuclear Fusion- A process that occurs when the nuclei of several atoms combine into one larger nucleus. (2 hydrogen atoms combine to form 1 helium atom) 2. Core- where the energy from the sun is produced through nuclear fusion.

3. Radiative zone- energy produced in the core moves outward through this middle layer. It consists of tightly packed gas. Energy takes more than 100,000 years to move through this layer because it is so dense. 4. Convection zone- Layer above the radiation zone. Hot gases rise as cooler gases sink forming loops of energy.

The Sun’s Atmosphere 5. Photosphere- the sphere that gives off light. When you look at the sun this is what you see (surface). 6. Chromosphere- the “color sphere” middle layer visible during a solar eclipse. (reddish glow)

Atmosphere continued 7. Corona- Outer layer which extends into space for millions of kilometers. An even fainter layer visible during a solar eclipse.

Features of the Sun Sunspots- darker areas of gas on the sun that are cooler than the gases around them.

Prominences- Reddish loops of gas that link different parts of sunspot regions

Solar Flares- sudden release of energy that occurs when prominences link together

Solar Wind Solar winds are electrically charged particles from the sun Normally blocked by Earth’s magnetic field. At the North and South poles, particles interact with the earths magnetic field causing gas molecules to glow Solar wind can disrupt radio, tv, phone, and electrical power stations on earth. https://www.youtube.com/watch?v=Ip2ZGND1I9Q (aurora) https://www.youtube.com/watch?v=2zOlkIyg3iE (solar wind) https://www.youtube.com/watch?v=3JdWlSF195Y (song-why does the sun shine?)