Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Unit1 Solar System
Grade 6
| Question | Answer |
|---|---|
| Nebula | a large cloud of gas and dust |
| Nuclear fusion | Series of reactions take place in the core of stars |
| Galaxy | a large collection of stars, gas, and dust. |
| Universe | space and all the matter and energy in it |
| Light year | the distance that light travels through space in one year. |
| Clusters | contain as many as several thousand galaxies |
| Superclusters | made up of 10 or more clusters of galaxies |
| Voids | huge spherical areas where very little matter exists |
| Supernova | a gigantic explosion in which a high-mass star collapses, throwing its outer layers into space. But its core remains. |
| Black hole | an invisible object with gravity so great that nothing, not even light, can escape it |
| Neutron | is a small, incredibly dense ball of closely packed neutrons. |
| Supergiant | When hydrogen fusion slows, the core of high mass stars , produce elements heavier than carbon, then it expand to become much larger. |
| solar system | consists of a star, the sun, and all the objects in orbit around the sun. |
| Terrestrial | Planets have solid, rocky crusts and dense mantles and cores. |
| Gas giant | Planets are gaseous, larger, and less dense than the terrestrial planets. |
Created by:
ljouda
Popular Science sets