| A | B |
|---|
| Largest Moon in Solar System | Ganymede |
| Two planets without moons | Mercury & Venus |
| Terrestrial Planets (def) | Earthlike planets, similar in origin & composition |
| 4 Inner Planets | Mercury, Venus, Earth, Mars |
| 4 Outer Planets | Jupiter, Saturn, Uranus, Neptune |
| Inner Planets (def) | Planets between the sun & asteroid belt |
| Outer Planets (def) | Planets that are further away than the asteroid belt |
| Planet with the shortest year | Mercury |
| 2 Planets sometimes seen as morning or evening stars | Mercury & Venus |
| Messenger of the Roman Gods | Mercury |
| Roman Goddess of Love & Beauty | Venus |
| Planet with a day longer than its year | Venus |
| Planet with retrograde rotation | Venus |
| Planet with the slowest rotation | Venus |
| Earth's Twin | Venus |
| Only planet with water in all 3 phases of matter | Earth |
| Only planet with evidence of life | Earth |
| Latin for Earth | Terra |
| Greek for Earth | Geo |
| Roman God of War | Mars |
| Red Planet | Mars |
| Planet with a tilt most like Earth's | Mars |
| Planet with a length of day most like Earth's | Mars |
| Planet with 2 Moons | Mars |
| Planet with the largest known volcano in the solar system | Mars |
| Name of the largest volcano in the solar system | Olympus Mons |
| Canals (def) | Areas on the surface of Mars that once possibly held running water |
| 2 Moons of Mars | Phobos & Deimos |
| Meaning of the names of the Martian Moons | Fear & Panic |
| Jovian Planet (def) | Jupiter like planet, less dense than terrestrial planets, larger & gaseous |
| 2 Most abundant gases of Jovian planets | Hydrogen & Helium |
| 3 Characteristics true of all Jovian planets | Large planet, Gaseous planet, Ringed planet |
| Roche Limit (def) | Distance from a planet that determines whether a moon or ring system is formed by orbiting debris; debris within the Roche Limit forms rings due to the planets gravity; Debris outside the Roche limit forms Moons |
| Largest Planet | Jupiter |
| Planet with the shortest day | Jupiter |
| 2 Planets that radiate more heat back into space then they recieve from the sun | Jupiter & Saturn |
| Planet with the Great Red Spot | Jupiter |
| Planet with the Galiean Moons | Jupiter |
| Name the 4 Galiean Moons | Io, Europa, Ganymede, Callisto |
| Comet that impacted Jupiter in 1994 | Comet Shoemaker-Levy |
| Volcanic moon of Jupiter | Io |
| Most cratered body in the solar system | Callisto |
| Largest moon in the solar system | Ganymede |
| Largest moon of Jupiter | Ganymede |
| Moon of Jupiter with a thick crust of Ice; may be a possible source of liquid water | Europa |
| Least dense planet | Saturn |
| Planet with the most spectacular ring system | Saturn |
| Largest moon of Saturn | Titan |
| Moon of Saturn that has a substancial atmophere | Titan |
| Planet that presently (2001) has the most moons | Uranus |
| 2 Planets with a blue-green color due to methane in their atmospheres | Uranus & Neptune |
| Planet that rotates on its side | Uranus |
| Planet with the Great Dark Spot | Neptune |
| Largest moon of Neptune | Triton |
| 2 planets who's orbital paths cross | Pluto & Neptune |
| The furthest planet from the sun | Pluto |
| The furthest planet from the sun from 1979-1999 | Neptune |
| Pluto's only moon | Charon |
| Kuiper Belt (def) | vast disk of icy comets near Neptune's orbit; closest comet source |
| Asteroids (def) | large piece of rock in space |
| Largest asteroid | Ceres |
| Comets (def) | composed of dust & rock particles mixed in with frozen water, methane & ammonia; most have very eccentric orbits |
| Coma (def) | hazy, melting ice cloud around the solid part of the comet |
| Comet Head (def) | Nucleus & Coma of a comet |
| Nucleus of a comet (def) | Solid, frozen ball of the comet |
| Comet Tail (def) | Debris trail formed by the solar winds pushing away small melting particles |
| Direction a comet tail always faces | Away from the sun due to solar winds |
| 4 Examples of Comets | Halley’s, Encke’s, Shoemaker-Levy, & Hale-Bopp |
| Meteoroid (def) | the small pieces of rock moving from space; possibly left over from a fully melted comet |
| Meteor (def) | a meteoroid that burns up in Earth's atmosphere; glows as it is falling |
| Meteorite (def) | the part of a meteoroid that did not totally burn up & strikes the Earth, sometimes making a crater |
| Large crater found in Arizona that has not been weathered or erodes away | Barringer Crater |
| Area of impact for most meteorites | Ocean |
| Land area of impact for most meteorites | The polar regions |
| Order of the Planets from the sun | Mercury, Venus, Earth, Mars, Asteroid belt, Jupiter, Saturn, Uranus, Neptune, Pluto |
