| A | B |
|---|
| Photosphere | The innermost (lowest) layer of the sun's atmosphere responsible for the light we see. |
| Chromoshpere | The intermediate (middle) layer of the sun's atmosphere where temperatures can reach 27,000 degrees celcius. |
| Corona | The outermost (highest) layer of the sun's atmosphere that can extend millions of kilometers in space. |
| Sunspot | Cool, dark regions found on the surface of the sun. |
| Axis | Imaginary line that runs through the center of the earth. |
| Rotation | The amount of time it takes the earth to turn once in space causing day and night. |
| Revolution | The amount of time it takes the earth to go around the sun once resulting in a year. |
| Ellipse | The shape of the orbits of the planets. |
| Maria | Dark, flat regions of ancient lava on the surface of the moon. |
| Lunar Eclipse | Phenomenon that occurs when the earth passes between the sun and the moon casting a shadow. |
| Solar Eclipse | Phenomenon that occurs when the moon passes between the sun and the earth casting a shadow. |
| Moon Phase | The change in appearance of the moon as it orbits the earth. |
| Equinox | The two times each year that the sun is directly over the equator causing the amount of time for day and night to be the same. |
| Solstice | The two times each year that the sun reaches its greatest angle over the equator causing the start of summer and winter. |
| Waxing | The time referring to when the amount of light hitting the moon's surface increases. |
| Waning | The time referring to when the amount of light hitting the moon's surface decreases. |
| Tide | The increasing and decreasing of water on the surface of earth caused by the moon and sun. |
| Magnetosphere | The field of energy surrounding the earth caused by a molten core rotating around a solid inner core. |
| Solar Flare | A violent eruption of energy off the surface of the sun. |
| Prominence | A violent eruption of energy off the surface of the sun that arches over a sunspot. |
