| A | B |
|---|
| universe | everything you can see, hear, touch or measure that exists |
| What layer is the corona? | outer layer of the sun's atmosphere |
| size of the sun | sun is an average sized star |
| distance of sun from Earth | 93,000,000 miles away |
| chromosphere | "color sphere" glows red, with hot gases that shoot up at high speed into the corona |
| core | hottest part of the sun deep in the center where the sun's energy is created |
| hydrogen | flammable gas whose nuclei fuse and become helium |
| heat and light | form of energy given off during the sun's nuclear reaction in the core |
| radiation (radiative) zone | energy moves from the hot core to cooler areas |
| convection (convective) zone | violent, circular movement of gases carry energy to the sun's surface |
| number of layers in the sun's atmosphere | three |
| photosphere | "light layer" - visible surface of the sun |
| dark, cooler areas on the sun's surface | sunspots |
| two gases that mostly make up the sun | hydrogen and helium |
| prominences | giant clouds of gas that form fiery arms and huge loops which stretch for hundreds of miles into space |
| solar wind | stream of energized particles that escape from the sun |
| flares | last only a few seconds and are usually seen around sunspots, they can disrupt radio transmissions on Earth |
| two layers seen only during an eclipse | corona and chromosphere |
| two main parts of the sun | core and atmosphere |
| It takes millions of years for the sun's energy to get out of these two areas | the core and the radiation zone |
| How long it takes the sun's energy to reach the Earth once it leaves the photosphere | 8 minutes |
| What are changed during a nuclear reaction? | atoms' nuclei |
| Why do nuclear reactions occur in the sun's core? | Because of intense heat and pressure |
| What gives off a soft red glow when seen during a solar eclipse? | chromosphere during a solar eclipse |
| What gives off a glow only half as bright as the moon? | The corona |
