definition
long answer
complete the sentence
100
define asteroid.
a small rocky body orbiting the sun.
100
are meteors also called " shooting stars"?
yes
100
comets are composed of ___ , ___and ____
dust, ice and rock
200
define meteoroid.
a small body moving in the solar system
200
most asteroids are normally found between mars and Jupiter.
yes
200
astronomers think that Pluto is composed of ____ and ___, and estimate its diameter to be 2300km
rock and ice
300
define meteors.
a small body of matter from outer space that enters the earth's atmosphere, becoming incandescent as a result of friction and appearing as a streak of light.
300
a comet is only composed of rocky material and gas.
no
300
Pluto has ____ known moons.
three
400
define dwarf planet.
a celestial body resembling a small planet but lacking certain criteria that are required for it to be classed as such.
400
is Pluto considered the ninth planet
no
400
most comets originate in the ___ and the ____.
Kuiper belt and the Oort cloud