8th Grade Ch4 Vocabulary

having the sun at the center...

dark flat areas on the moon...

region of the solar system between mars & jupiter...

solid inner core of a comet...

region where most of the known dwarf planets orbit...

thin disk of small particles of ice and rock....

object that orbits the sun, is spherical but has not cleared the area of its orbit...

region where most comets originate..

chunk of rock or dust in space...

used to measure distances within the solar system...

the sun, it's planets, their moons & a variety of smaller objects..

having Earth at the center...

an oval shape...

four outer planets much larger & massive than Earth; do not have solid surfaces...

meteoroid found on Earth's surface....

object that orbits the sun, is round and has cleared the area of its orbit...

loose collection of ice & dust that orbits the sun; typically in a long narrow orbit...

atmosphere traps heat...

fuzzy outer layer of a comet...

rocky objects most of which are too small & numerous to be considered planets or dwarf planets:

streak of light produced when a meteroid enters Earth's atmosphere...

large round pits on the moon...

four inner planets with names derived from latin root "earth"...