1. Name one part of the sun. 2. Is the sun a solid, liquid or gas? 3. How hot was the center of the sun when it officially became a star?

Objective: Understanding the composition of the sun and phenomena that occurs there.

 Chromosphere – layer of the atmosphere above the photosphere  Convection Layer – transports heat by rising currents of hot gas  Corona – largest/hottest layer of the atmosphere (1 million K)

 Photosphere – “surface” of the sun; gives off light  Prominence – eruptions on the solar surface  Radiation Layer – energy from fusion in the core moves outward

 Solar Flare – eruption that ejects high energy particles  Solar Wind – hot gases (ionized hydrogen) blow from the corona  Sun Spots – cool, dark areas on the solar surface

 Sun produces energy by nuclear fusion  Sun is a gas and rotates at different speeds  Equator: days  Poles: days

 Binary System – when two stars orbit each other  Our sun IS NOT a binary system