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Ch.11 Vocab
Chapter 11 Vocab
| Term | Definition |
|---|---|
| asteroid | Small rocky bodies in our solar system, they orbit the sun |
| axis | An imaginary line through earth extending from the north pole to the south pole |
| black hole | A large sphere of tightly packed material with an extraordinary amount of gravitational pull |
| comet | A small body made up of rocky material and ice that occurs in the Kuiper Belt and the Oort cloud |
| doppler effect | an increase (or decrease) in the frequency of sound, light, or other waves as the source and observer move toward (or away from) each other. |
| Fusion | the process or result of joining two or more things together to form a single entity |
| interstellar matter | The material that fills space |
| light-year | The distance at which light moves 300,00km/s travels in a year equals about 9.5 trillion km |
| parallax | The apparent shift of an object against a stationary caused by the change of position of the observer |
| planet | a celestial body that orbits one or more stars with its own gravitational pull |
| revolution | The motion of earth as it orbits the sun at 30km/s |
| rotation | The motion of earth as it spins on its axis from east to west at 1670km/h |
| solar system | A group of planets circling one or more stars |
| star | A celestial body of hot gasses with a core like a furnace |
| supernova |
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