| Word |
Definition |
| Geocentric |
A description of the solar system in which all of the planets revolve around Earth. |
| Heliocentric |
A description of the solar system in which all of the planets revolve around the sun. |
| Ellipse |
An elongated circle, or oval shape; the shape of the planets' orbits. |
| Inertia |
The tendency of a moving object to continue in a straight line or a stationary object to remain in place. |
| Nuclear fusion |
The process by which hydrogen atoms join together to form helium, releasing energy. |
| Core |
The central part of the sun, where nuclear fusion occurs. |
| Photosphere |
The inner layer of the sun's atmosphere. |
| Chromosphere |
The middle layer of the sun's atmosphere. |
| Corona |
The outer layer of the sun's atmosphere. |
| Solar wind |
A stream of electrically charged particles produced by the sun's corona. |
| Sunspot |
A dark area of gas on the sun that is cooler than surrounding gases. |
| Prominence |
A loop of gas that protrudes from the sun's surface, linking parts of sunspot regions. |
| Solar flare |
An explosion of hydrogen gas from the sun's surface that occurs when loops in sunspot regions suddenly connect. |
Buen Viaje lv.2 ch 8
