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
Astronomy
| Term | Definition |
|---|---|
| Rotation | the act of an object spinning on its axis |
| Revolution | the act of an object moving in a circular motion around another object |
| What are the most common elements in the universe | hydrogen and helium |
| Light year | the distance light travels in a year |
| Waxing | illuminated area is increasing |
| Waning | illuminated area is decreasing |
| Which side of the moon is lit up in the waning phases | left side |
| Which side of the moon is lit up in the waxing phases | right side |
| How long is the moons revolution period | 27 days |
| how long does it take for the moon to go from new moon to full moon | 29.5 |
| Terrestrial planets | Mercury, Venus, Earth, and Mars |
| Gas Giants | Neptune, Uranus, Saturn, and Jupiter |
| Astroid | Asteroids are small, rocky objects that orbit the Sun |
| Comets | a celestial object consisting of a nucleus of ice and dust |
| Photosphere | the luminous envelope of a star from which its light and heat radiate |
| Corona | the rarefied gaseous envelope of the sun and other stars |
| Solar winds | the continuous flow of charged particles from the sun which permeates the solar system |
| Sunspots | a spot or patch appearing from time to time on the sun's surface |
| Nuclear fusion | how the suns energy is created |
| Inner planets | Mercury, Venus, Earth, and Mars |
| Outer planets | Jupiter and Saturn and ice giants Uranus and Neptune |
| Asteroid belt | containing the greatest population of asteroids in our solar system |
| Meteors | a space rock—or meteoroid—that enters Earth's atmosphere |
| Meteoroids | a small body moving in the solar system that would become a meteor if it entered the earth's atmosphere |
| Meteorites | a rock that falls to Earth from space |
| Tail | consists of gas and dust that can extend hundreds of millions of kilometers away from the coma |
| Nucleus | the solid, central part of a comet |
| Coma | the nebulous envelope around the nucleus of a comet |
| Which way does the comet tail point | away from the sun |
| 90% of stars are | main sequence |
| Nebula | a distinct body of interstellar clouds |
| Main sequence | about 90 percent of the stars in the universe |
| Red giant | a luminous giant star of low or intermediate mass |
| Red supergiant | occurs when a moderately massive star — perhaps 8–40 solar masses in size — exhausts its hydrogen fuel |
| Supernova | a powerful and luminous stellar explosion |
| Black Dwarf | a theoretical stellar remnant |
| Black hole | a region of spacetime where gravity is so strong that nothing — no particles or even electromagnetic radiation such as light — can escape from it |
| What causes stars to have different life cycles? | mass |
| Milky way | our galaxy |
| Elliptical | a smooth, circular galaxy |
| Spiral | a galaxy with a spiral pattern |
| Irregular | a galaxy that has no pattern |
Created by:
Averytaylorb
Popular Earth Science sets